NC0003468_2. DRSS CAP Part 2_Tables_FINAL_20160210

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Table 2-1 Summary of Horizontal Hydraulic Gradient Calculations
Groundwater Elevation
Groundwater Elevation
Flow Path
Horizontal
Wells
Up -gradient Well
Down -gradient Well
Length
Hydraulic Gradient
(h2, msl)
(hi, msl)
(dl, ft)
(1, feet(foot)
Shallow Wells
GWA-1 S /
569.14'
540.04'
1,220'
0.024
GWA-11 S
GWA-7S / AB-
525.58'
495.48'
1,070'
0.028
25S
GWA-8S /
568.01'
525.58'
1,570'
0.027
GWA-7S
GWA-12S /
571.23'
507.26'
1,700'
0.038
BG-5S
Average Horizontal Hydraulic Gradient
0.029
Deep Wells
GWA-8D / BG-
566.73'
507.02'
2,440'
0.024
5D
GWA-9D /
579.15'
519.97'
2,180'
0.027
GWA-1 OD
GWA-7D / AB-
524.87'
490.77'
1,410'
0.024
25D
AS-4D / AB-
544.15'
490.52'
1,370'
0.039
30D
Average Horizontal Hydraulic Gradient
0.029
Bedrock Wells
AS-813R / MW-
544.85'
525.17'
490'
0.040
315BR
MW-310BR /
521.54'
495.51'
815'
0.032
MW-311 BR
MW-303BR /
557.63'
505.97'
1,525'
0.034
AB-30BR
MW-314BR /
510.08'
486.06'
750'
0.032
MW-22BR
Average Horizontal Hydraulic Gradient
0.035

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
AB-10D
Sample Location
AB-25D
Sample Location
AB-30BR
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
100 U
270
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
pg/L
1.5
1.3
-14.29
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Arsenic
7440-38-2
D
pg/L
0.41 J
0.42 J
2.41
0.25 J
0.25 J
0
0.78
0.77
-1.29
Barium
7440-39-3
D
pg/L
310
500
46.91
26
26
0
110
110
0
Beryllium
7440-41-7
D
pg/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
Boron
7440-42-8
D
pg/L
240
210
-13.33
930
940
1.07
310
300
-3.28
Cadmium
7440-43-9
D
pg/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
Chromium
7440-47-3
D
pg/L
3.4
4.3
23.38
0.33 J+
0.25 J+
-27.59
0.21 J
0.19 J
-10
Cobalt
7440-48-4
D
pg/L
1.1
1.5
30.77
0.34 J+
0.35 J+
2.9
0.5 U
0.5 U
ND/NA
Copper
7440-50-8
D
pg/L
5.3
1.2
-126.15
1.3 J+
0.5 J+
-88.89
1 U
1 U
ND/NA
Iron
7439-89-6
D
pg/L
50 UJ
50 UJ
ND/NA
50 U
50 U
ND/NA
94
90
-4.35
Lead
7439-92-1
D
pg/L
1
0.52
-63.16
0.13 J+
0.049 J+
-90.5
0.1 U
0.1 U
ND/NA
Manganese
7439-96-5
D
pg/L
5 U
5 U
ND/NA
510
500
-1.98
400
400
0
Mercury
7439-97-6
D
pg/L
0.2 U
0.2 U
ND/NA
0.2 UJ
0.2 UJ
ND/NA
0.2 U
0.2 U
ND/NA
Molybdenum
7439-98-7
D
pg/L
2.1
2.3
9.09
11.4
11.2
-1.77
2.9
2.8
-3.51
Nickel
7440-02-0
D
pg/L
1.7
2
16.22
3 J+
2.9 J+
-3.39
0.85
0.82
-3.59
Selenium
7782-49-2
D
pg/L
0.35 J
0.36 J
2.82
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Strontium
7440-24-6
D
pg/L
3400
5000
38.1
160
160
0
870
870
0
Thallium
7440-28-0
D
pg/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
Titanium
7440-32-6
D
pg/L
ND/NA
ND/NA
ND/NA
Vanadium
7440-62-2
ID
pg/L
0.96 J
0.74 J
-25.88
0.45 J
0.47 J
4.35
1 U
1 U
ND/NA
Zinc
7440-66-6
ID
pg/L
110 U
1 10 U
1 ND/NA
1 27 J+
1 26 J+
1 -3.77
10 U
1 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
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 1 of 11

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
AB-30D
Sample Location
AB-30S
Sample Location
AB-35BR
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
100 U
190
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
pg/L
0.43 J
0.15 J
-96.55
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Arsenic
7440-38-2
D
pg/L
0.35 J
0.31 J
-12.12
0.5 U
0.5 U
ND/NA
9.3
9
-3.28
Barium
7440-39-3
D
pg/L
91
110
18.91
110
110
0
370
400
7.79
Beryllium
7440-41-7
D
pg/L
0.2 U
0.2 U
ND/NA
0.44
0.43
-2.3
0.2 U
0.2 U
ND/NA
Boron
7440-42-8
D
pg/L
290
300
3.39
320
320
0
220
210
-4.65
Cadmium
7440-43-9
D
pg/L
0.08 U
0.08 U
ND/NA
0.064 J
0.084
27.03
0.08 U
0.08 U
ND/NA
Chromium
7440-47-3
D
pg/L
0.75
0.91
19.28
0.2 J
0.39 J
64.41
0.55
0.49 J
-11.54
Cobalt
7440-48-4
D
pg/L
0.27 J
0.4 J
38.81
24.9
25.3
1.59
0.5 U
0.5 U
ND/NA
Copper
7440-50-8
D
pg/L
0.57 J
0.42 J
-30.3
0.98 J
0.42 J
-80
1 U
1 U
ND/NA
Iron
7439-89-6
D
pg/L
50 J
370 J+
152.38
33 J
34 J
2.99
50 U
50 U
ND/NA
Lead
7439-92-1
D
pg/L
0.1
0.11
9.52
0.39
0.097 J
-120.33
0.1 U
0.1 U
ND/NA
Manganese
7439-96-5
D
pg/L
380
530
32.97
1400
1400
0
150
140
-6.9
Mercury
7439-97-6
D
pg/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
pg/L
1.3
0.74
-54.9
0.5 U
0.5 U
ND/NA
21.3
19.9
-6.8
Nickel
7440-02-0
D
pg/L
1.7
1.6
-6.06
7.8
7.8
0
0.77
0.82 J
6.29
Selenium
7782-49-2
D
pg/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
Strontium
7440-24-6
D
pg/L
420
470
11.24
150
150
0
730
760
4.03
Thallium
7440-28-0
D
pg/L
0.1 U
0.1 U
ND/NA
0.1 U
0.022 J
ND/NA
0.1 U
0.1 U
ND/NA
Titanium
7440-32-6
D
pg/L
ND/NA
ND/NA
ND/NA
Vanadium
7440-62-2
D
pg/L
0.57 J
1 0.56 J
1 -1.77
1 U
1 1 U
I ND/NA
1.5
1.5
0
Zinc
7440-66-6
ID
pg/L
21
1 15
1 -33.33
1 58
1 66
1 12.9
1 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
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 2 of 11

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
AB-513
Sample Location
AS-12S
Sample Location
AS-411)
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
100 U
83 J
ND/NA
100 U
100 U
ND/NA
98 J
100 U
ND/NA
Antimony
7440-36-0
D
pg/L
0.5 U
0.5 U
ND/NA
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Arsenic
7440-38-2
D
pg/L
14.1
14.6
3.48
0.23 J
ND/NA
1.5
1.5
0
Barium
7440-39-3
D
pg/L
64
65
1.55
31
31
0
88
88
0
Beryllium
7440-41-7
D
pg/L
0.2 U
0.2 U
ND/NA
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
Boron
7440-42-8
D
pg/L
630
630
0
1300
1300
0
800
800
0
Cadmium
7440-43-9
D
pg/L
0.08 U
0.08 U
ND/NA
0.036 J
ND/NA
0.08 U
0.08 U
ND/NA
Chromium
7440-47-3
D
pg/L
0.5 U
0.93
ND/NA
0.49 J
ND/NA
0.19 J+
0.46 J+
83.08
Cobalt
7440-48-4
D
pg/L
5.4
5.7
5.41
1.2
ND/NA
2.7
2.6
-3.77
Copper
7440-50-8
D
pg/L
0.24 J
0.74 J
102.04
6.8
ND/NA
1 UJ
1 UJ
ND/NA
Iron
7439-89-6
D
pg/L
1100
1100
0
370
420
12.66
170
150
-12.5
Lead
7439-92-1
D
pg/L
0.08 J
0.06 J
-28.57
0.51
ND/NA
0.059 J+
0.1 UJ
ND/NA
Manganese
7439-96-5
D
pg/L
1300
1300
0
330
340
2.99
770
780
1.29
Mercury
7439-97-6
D
pg/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
pg/L
4.4
4.6
4A4
0.59
ND/NA
7.6
7.3
-4.03
Nickel
7440-02-0
D
pg/L
7
7.9
12.08
5.7
ND/NA
2.5 J+
2.5 J+
0
Selenium
7782-49-2
D
pg/L
0.5 U
0.5 U
ND/NA
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Strontium
7440-24-6
D
pg/L
470
480
2.11
700
700
0
970
950
-2.08
Thallium
7440-28-0
D
pg/L
0.1 U
0.1 U
ND/NA
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
Titanium
7440-32-6
D
pg/L
ND/NA
ND/NA
ND/NA
Vanadium
7440-62-2
ID
pg/L
1 U
1 U
ND/NA
0.32 J
ND/NA
1 U
1 U
ND/NA
Zinc
7440-66-6
ID
pg/L
10 U
1 2.7 J
ND/NA
27
25
-7.69
10 UJ
10 UJ
ND/NA
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 3 of 11

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
AS-8BR
Sample Location
AS-811)
Sample Location
BG-5D
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
100 U
100 U
ND/NA
100 U
100 U
ND/NA
100 U
130
ND/NA
Antimony
7440-36-0
D
pg/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.50 U
0.50 U
ND/NA
Arsenic
7440-38-2
D
pg/L
0.5 U
0.14 J
ND/NA
0.41 J
0.35 J
-15.79
0.50 U
0.50 U
ND/NA
Barium
7440-39-3
D
pg/L
77
77
0
69
69
0
19
20
5.13
Beryllium
7440-41-7
D
pg/L
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.20 U
0.20 U
ND/NA
Boron
7440-42-8
D
pg/L
50 U
50 U
ND/NA
50 U
50 U
ND/NA
50 U
50 U
ND/NA
Cadmium
7440-43-9
D
pg/L
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
0.080 U
0.080 U
ND/NA
Chromium
7440-47-3
D
pg/L
0.3 J
0.35 J
15.38
0.54
0.5 U
ND/NA
0.50 U
0.38 J
ND/NA
Cobalt
7440-48-4
D
pg/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.30 J
0.34 J
12.5
Copper
7440-50-8
D
pg/L
1 U
1 U
ND/NA
1 U
1 U
ND/NA
0.47 J
0.79 J
50.79
Iron
7439-89-6
D
pg/L
150
150
0
700
670
-4.38
220
260
16.67
Lead
7439-92-1
D
pg/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.049 J
0.12
84.02
Manganese
7439-96-5
D
pg/L
920
910
-1.09
1000
990
-1.01
540
540
0
Mercury
7439-97-6
D
pg/L
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.20 U
0.20 U
ND/NA
Molybdenum
7439-98-7
D
pg/L
0.13 J
0.17 J
26.67
0.13 J
0.13 J
0
0.58
0.58
0
Nickel
7440-02-0
D
pg/L
0.34 J
0.38 J
11.11
0.33 J
0.32 J
-3.08
0.17 J
1.1
146.46
Selenium
7782-49-2
D
pg/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.50 U
0.50 U
ND/NA
Strontium
7440-24-6
D
pg/L
380
380
0
310
320
3.17
270
270
0
Thallium
7440-28-0
D
pg/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.10 U
0.10 U
ND/NA
Titanium
7440-32-6
D
pg/L
ND/NA
ND/NA
ND/NA
Vanadium
7440-62-2
ID
pg/L
1 U
1 U
ND/NA
1 U
1 U
ND/NA
1.0 U
0.32 J
ND/NA
Zinc
7440-66-6
ID
I pg/L
110 U
1 10 U
ND/NA
10 U
10 U
ND/NA
3.1 J
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
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 4 of 11

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
BG-5S
Sample Location
GWA-10D
Sample Location
GWA-11 D
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
100 U
100 U
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
pg/L
0.50 U
0.50 U
ND/NA
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Arsenic
7440-38-2
D
pg/L
0.50 U
0.50 U
ND/NA
0.5 U
0.5 U
ND/NA
0.28 J
0.28 J
0
Barium
7440-39-3
D
pg/L
12
12
0
32
34
6.06
55
56 J
1.8
Beryllium
7440-41-7
D
pg/L
0.20 U
0.20 U
ND/NA
0.13 J
0.13 J
0
0.2 U
0.2 U
ND/NA
Boron
7440-42-8
D
pg/L
50 U
50 U
ND/NA
300
300
0
50 U
50 U
ND/NA
Cadmium
7440-43-9
D
pg/L
0.080 U
0.080 U
ND/NA
0.033 J
0.042 J
24
0.08 U
0.08 U
ND/NA
Chromium
7440-47-3
D
pg/L
0.29 J
0.42 J
36.62
2.2
1.5
-37.84
2.3 J+
1.1 J+
-70.59
Cobalt
7440-48-4
D
pg/L
0.50 U
2.8
ND/NA
0.71
0.6
-16.79
1.4
1.4 J
0
Copper
7440-50-8
D
pg/L
0.39 J
1.0 U
ND/NA
1.2
0.82 J
-37.62
4
1 U
ND/NA
Iron
7439-89-6
D
pg/L
50 U
50 U
ND/NA
64
52
-20.69
2200
2200 J
0
Lead
7439-92-1
D
pg/L
0.10 U
0.10 U
ND/NA
0.16
0.12
-28.57
0.41 J+
0.1 UJ
ND/NA
Manganese
7439-96-5
D
pg/L
20
19
-5.13
160
130
-20.69
890
900 J
1.12
Mercury
7439-97-6
D
pg/L
0.20 U
0.20 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
Molybdenum
7439-98-7
D
pg/L
0.50 U
0.50 U
ND/NA
0.095 J
0.5 U
ND/NA
1.1
0.87 J
-23.35
Nickel
7440-02-0
D
pg/L
0.42 J
0.39 J
JA1
8.8
7.7
-13.33
11.3
5.1 J+
-75.61
Selenium
7782-49-2
D
pg/L
0.50 U
0.50 U
ND/NA
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Strontium
7440-24-6
D
pg/L
230
230
0
360
370
2.74
450
450
0
Thallium
7440-28-0
D
pg/L
0.10 U
0.10 U
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
Titanium
7440-32-6
D
pg/L
ND/NA
ND/NA
ND/NA
Vanadium
7440-62-2
D
pg/L
1.0 U
1.0 U
ND/NA
0.29 J
0.28 J
-3.51
1 U
1 U
ND/NA
Zinc
7440-66-6
D
pg/L
5.5 J
1 10 U
1 ND/NA
45
30
-40
3.7 J+
2.6 J+
-34.92
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 5 of 11

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
GWA-11S
Sample Location
GWA-1S
Sample Location
GWA-31)
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
100 U
100 U
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
pg/L
0.16 J
0.5 U
ND/NA
0.9
0.54
-50
0.5 J
0.41 J
-19.78
Arsenic
7440-38-2
D
pg/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
Barium
7440-39-3
D
pg/L
18
17
-5.71
7.7
7.8
1.29
6
6.1
1.65
Beryllium
7440-41-7
D
pg/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
Boron
7440-42-8
D
pg/L
110
120
8.7
50 U
50 U
ND/NA
27 J
29 J
7.14
Cadmium
7440-43-9
D
pg/L
0.031 J
0.026 J
-17.54
0.08 U
0.08 U
ND/NA
0.062 J
0.045 J
-31.78
Chromium
7440-47-3
D
pg/L
3.7
2.7
-31.25
0.48 J
0.38 J
-23.26
17.4
14.1
-20.95
Cobalt
7440-48-4
D
pg/L
3.6
3.5
-2.82
1.5
1.7
12.5
0.91
0.78
-15.38
Copper
7440-50-8
D
pg/L
0.38 J
0.58 J
41.67
2.4
0.4 J
-142.86
2.6 J+
1.1 J+
-81.08
Iron
7439-89-6
D
pg/L
180
220
20
50 U
50 U
ND/NA
220
200
-9.52
Lead
7439-92-1
D
pg/L
0.19
0.18
-5.41
0.27
0.1 U
ND/NA
0.27
0.16
-51.16
Manganese
7439-96-5
D
pg/L
880
820
-7.06
71
73
2.78
76
72
-5.41
Mercury
7439-97-6
D
pg/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
pg/L
0.3 J
0.25 J
-18.18
0.5 U
0.5 U
ND/NA
0.56
0.48 J
-15.38
Nickel
7440-02-0
D
pg/L
9.1
7.9
-14.12
2.1
2
-4.88
28.4
23.5
-18.88
Selenium
7782-49-2
D
pg/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
Strontium
7440-24-6
D
pg/L
190
200
5.13
35
35
0
160
170
6.06
Thallium
7440-28-0
D
pg/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
Titanium
7440-32-6
D
pg/L
ND/NA
ND/NA
ND/NA
Vanadium
7440-62-2
ID
pg/L
1 U
0.32 J
ND/NA
1 U
1 U
ND/NA
1 U
1 U
ND/NA
Zinc
7440-66-6
ID
I pg/L
111
1 5.1 J
-73.29
22
23
4A4
29
16 J+
-57.78
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 6 of 11

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
GWA-811)
Sample Location
GWA-91)
Sample Location
MW-11
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
100 U
100 U
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
pg/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
pg/L
0.98
1
2.02
0.69
0.66
-4.44
0.5 U
0.5 U
ND/NA
Barium
7440-39-3
D
pg/L
32
32
0
20
20
0
71
71
0
Beryllium
7440-41-7
D
pg/L
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.46
0.46
0
Boron
7440-42-8
D
pg/L
50 U
50 U
ND/NA
50 U
50 U
ND/NA
290
290
0
Cadmium
7440-43-9
D
pg/L
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
0.046 J
0.042 J
-9.09
Chromium
7440-47-3
D
pg/L
1.1
0.69
-45.81
0.34 J
0.53
43.68
0.24 J
0.26 J
8
Cobalt
7440-48-4
D
pg/L
0.5 U
0.5 U
ND/NA
0.36 J
0.4 J
10.53
33.9
32.8
-3.3
Copper
7440-50-8
D
pg/L
0.32 J
0.22 J
-37.04
1.9
1 U
ND/NA
2.5
1.7
-38.1
Iron
7439-89-6
D
pg/L
140
130
-7.41
1800
1800
0
50 U
50 U
ND/NA
Lead
7439-92-1
D
pg/L
0.1 U
0.1 U
ND/NA
0.13
0.1 U
ND/NA
0.24
0.15
-46.15
Manganese
7439-96-5
D
pg/L
1600
1600
0
690
690
0
930
930
0
Mercury
7439-97-6
D
pg/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
pg/L
2.4
2.4
0
0.12 J
0.12 J
0
0.5 U
0.5 U
ND/NA
Nickel
7440-02-0
D
pg/L
0.81
0.75
-7.69
0.98
1.2
20.18
6
6.3
4.88
Selenium
7782-49-2
D
pg/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
Strontium
7440-24-6
D
pg/L
730
740
1.36
52
52
0
64
63
-1.57
Thallium
7440-28-0
D
pg/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.017 J
ND/NA
Titanium
7440-32-6
D
pg/L
ND/NA
ND/NA
ND/NA
Vanadium
7440-62-2
ID
pg/L
0.41 J
0.4 J
-2.47
1 U
1 U
ND/NA
0.67 J
0.48 J
-33.04
Zinc
7440-66-6
ID
I pg/L
110 U
1 10 U
ND/NA
10 U
10 U
ND/NA
15
5.9 J
-87.08
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 7 of 11

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
M W-11 D
Sample Location
M W-21 S
Sample Location
M W-303BR
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
100 U
68 J
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
pg/L
0.5 U
0.5 U
ND/NA
0.18 J
0.18 J
0
0.36 J
0.24 J
-40
Arsenic
7440-38-2
D
pg/L
0.18 J
0.17 J
-5.71
34.2
34.6
1.16
2.5
2.7
7.69
Barium
7440-39-3
D
pg/L
48
54
11.76
40
40
0
71
76
6.8
Beryllium
7440-41-7
D
pg/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
Boron
7440-42-8
D
pg/L
98
100
2.02
250
250
0
50 U
50 U
ND/NA
Cadmium
7440-43-9
D
pg/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
Chromium
7440-47-3
D
pg/L
0.82
1.6
64.46
0.5 U
0.5 U
ND/NA
0.28 J
0.5 U
ND/NA
Cobalt
7440-48-4
D
pg/L
0.5 U
0.5 U
ND/NA
1.1
1.1
0
0.13 J
0.15 J
14.29
Copper
7440-50-8
D
pg/L
10.9
1.1
-163.33
0.27 J
0.43 J
45.71
5.5
1.7
-105.56
Iron
7439-89-6
D
pg/L
50 U
50 U
ND/NA
50 U
50 U
ND/NA
2200
2600
16.67
Lead
7439-92-1
D
pg/L
1.3
0.05 J
-185.19
0.1 U
0.1 U
ND/NA
0.28
0.047 J
-142.51
Manganese
7439-96-5
D
pg/L
130
130
0
740
730
-1.36
530
580
9.01
Mercury
7439-97-6
D
pg/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
pg/L
3.6
3.8
5.41
19.7
20.4
3.49
2.1
1.5
-33.33
Nickel
7440-02-0
D
pg/L
1.9
1.9
0
1.2
1.2
0
3
3.5
15.38
Selenium
7782-49-2
D
pg/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
Strontium
7440-24-6
D
pg/L
520
520
0
420
420
0
180
190
5.41
Thallium
7440-28-0
D
pg/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
Titanium
7440-32-6
D
pg/L
ND/NA
ND/NA
ND/NA
Vanadium
7440-62-2
ID
pg/L
1 U
0.51 J
ND/NA
0.41 J
0.41 J
0
0.28 J
1 U
ND/NA
Zinc
7440-66-6
ID
pg/L
10 U
1 10 U
ND/NA
10 U
10 U
ND/NA
9 J+
5.7 J+
-44.9
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 8 of 11

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
MW-306BR
Sample Location
MW-310BR
Sample Location
MW-315BR
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
100 U
100 U
ND/NA
100 U
150
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
pg/L
0.5 U
0.5 U
ND/NA
1.4
1.3
-7.41
0.5 U
0.5 U
ND/NA
Arsenic
7440-38-2
D
pg/L
0.9
0.93
3.28
2.7
2.7
0
0.18 J
0.18 J
0
Barium
7440-39-3
D
pg/L
140
140
0
33
33
0
59
60
1.68
Beryllium
7440-41-7
D
pg/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
Boron
7440-42-8
D
pg/L
1500
1500
0
49 J
43 J
-13.04
50 U
50 U
ND/NA
Cadmium
7440-43-9
D
pg/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
Chromium
7440-47-3
D
pg/L
0.29 J
0.25 J
-14.81
0.63
1.2
62.3
0.19 J
0.22 J
14.63
Cobalt
7440-48-4
D
pg/L
1.2
1.2
0
0.5 U
0.5 U
ND/NA
0.48 J
0.51
6.06
Copper
7440-50-8
D
pg/L
0.8 J+
0.22 J+
-113.73
0.36 J
0.78 J
73.68
1 U
0.82 J
ND/NA
Iron
7439-89-6
D
pg/L
3100
3100
0
50 U
64
ND/NA
39 J
43 J
9.76
Lead
7439-92-1
D
pg/L
0.065 J
0.1 U
ND/NA
0.058 J
0.39
148.21
0.11
0.052 J
-71.6
Manganese
7439-96-5
D
pg/L
2200
2200
0
8.2
16
64.46
1100
1100
0
Mercury
7439-97-6
D
pg/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
pg/L
4.5
4.8
6.45
3.4
3.3
-2.99
0.21 J
0.23 J
9.09
Nickel
7440-02-0
D
pg/L
3.5
3.6
2.82
1.1
1.5
30.77
0.78
1.2
42.42
Selenium
7782-49-2
D
pg/L
0.5 U
0.5 U
ND/NA
0.39 J
0.35 J
-10.81
0.5 U
0.5 U
ND/NA
Strontium
7440-24-6
D
pg/L
1200
1200
0
160
160
0
460
470
2.15
Thallium
7440-28-0
D
pg/L
0.1 U
0.1 U
ND/NA
0.1 U
0.017 J
ND/NA
0.1 U
0.1 U
ND/NA
Titanium
7440-32-6
D
pg/L
ND/NA
ND/NA
ND/NA
Vanadium
7440-62-2
ID
pg/L
1 U
1 U
ND/NA
4.9
4.7
-4.17
1 U
1 U
ND/NA
Zinc
7440-66-6
ID
I pg/L
119 J+
1 7.2 J+
-90.08
10 U
10 U
ND/NA
2.8 J
3.6 J
25
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 9 of 11

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
MW-317BR
Sample Location
MW-318D
Sample Location
OW-308D
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
500
720
36.07
100 U
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
pg/L
4.7
4.5
-4.35
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Arsenic
7440-38-2
D
pg/L
0.42 J
0.49 J
15.38
1
1.1
9.52
737
727
-1.37
Barium
7440-39-3
D
pg/L
97
91
-6.38
34
32
-6.06
33
32
-3.08
Beryllium
7440-41-7
D
pg/L
0.2 U
0.2 U
ND/NA
0.31
0.28
-10.17
0.2 U
0.2 U
ND/NA
Boron
7440-42-8
D
pg/L
37 J
30 J
-20.9
1300
1200
-8
390
390
0
Cadmium
7440-43-9
D
pg/L
0.08 U
0.08 U
ND/NA
0.068 J
0,062 J
-9.23
0.08 U
0.08 U
ND/NA
Chromium
7440-47-3
D
pg/L
13A
14
4.38
0.38 J
0.52
31.11
0.25 J
0.3 J
18.18
Cobalt
7440-48-4
D
pg/L
0.37 J
0.39 J
5.26
6.6
8.1
20.41
0.15 J
0.15 J
0
Copper
7440-50-8
D
pg/L
2.6
3
14.29
2 J
0.66 J
-100.75
1 U
4.9
ND/NA
Iron
7439-89-6
D
pg/L
50 U
61
ND/NA
490
710
36.67
35300
35500
0.56
Lead
7439-92-1
D
pg/L
0.28
0.39
32.84
0.36
0.22 J
-48.28
0.1 U
0.1 U
ND/NA
Manganese
7439-96-5
D
pg/L
5 U
4 J
ND/NA
390
530
30.43
670
700
4.38
Mercury
7439-97-6
D
pg/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
pg/L
5.7
5.6
-1.77
0.5 U
0.5 U
ND/NA
1.6
1.6
0
Nickel
7440-02-0
D
pg/L
0.76
1
27.27
10.7
11.1
3.67
0.57
0.67
16.13
Selenium
7782-49-2
D
pg/L
0.89
0.8
-10.65
1.2
0.79
-41.21
0.5 U
0.5 U
ND/NA
Strontium
7440-24-6
D
pg/L
920
820
-11.49
650
620
-4.72
520
520
0
Thallium
7440-28-0
D
pg/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.075 J
0.073 J
-2.7
Titanium
7440-32-6
D
pg/L
ND/NA
ND/NA
ND/NA
Vanadium
7440-62-2
D
pg/L
5.8
6.1
5.04
1 U
1 U
ND/NA
1 U
1 U
ND/NA
Zinc
7440-66-6
D
pg/L
3A J
1 10 U
1 ND/NA
34 J
28
-19.35
10 U
1 10 U
1 ND/NA
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 10 of 11

Table 2-2 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater
Sample Location
OW-310D
Constituent
CAS RN
Fraction
Unit
0.45 pm Result
0.1 pm Result RPD (%)
Aluminum
7429-90-5
D
pg/L
100 U
130
ND/NA
Antimony
7440-36-0
D
pg/L
0.28 J
0.32 J
13.33
Arsenic
7440-38-2
D
pg/L
777
818
5.14
Barium
7440-39-3
D
pg/L
380
380
0
Beryllium
7440-41-7
D
pg/L
0.2 U
0.2 U
ND/NA
Boron
7440-42-8
D
pg/L
980
1000
2.02
Cadmium
7440-43-9
D
pg/L
0.08 U
0.08 U
ND/NA
Chromium
7440-47-3
D
pg/L
0.21 J
0.23 J
9.09
Cobalt
7440-48-4
D
pg/L
1.4
1.4
0
Copper
7440-50-8
D
pg/L
1 U
0.6 J
ND/NA
Iron
7439-89-6
D
pg/L
2200
2300
4.44
Lead
7439-92-1
D
pg/L
0.1 U
0.093 J
ND/NA
Manganese
7439-96-5
D
pg/L
1400
1400
0
Mercury
7439-97-6
D
pg/L
0.2 U
0.2 U
ND/NA
Molybdenum
7439-98-7
D
pg/L
45.9
46.1
0.43
Nickel
7440-02-0
D
pg/L
2.2
3.1
33.96
Selenium
7782-49-2
D
pg/L
0.5 U
0.5 U
ND/NA
Strontium
7440-24-6
D
pg/L
2600
2500
-3.92
Thallium
7440-28-0
D
pg/L
0.091 J
0.14
42.42
Titanium
7440-32-6
D
pg/L
ND/NA
Vanadium
7440-62-2
D
pg/L
1.6
2
22.22
Zinc
7440-66-6
D
pg/L
12
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
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 11 of 11

Table 2-3 Ash Porewater Analvtical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-1 OS
AB-10S
AB-10SL
AB-10SL
AB-15S
Round 1 (CSA Samplin
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
6/26/2015
9/11/2015
6/26/2015
9/11/2015
6/22/2015
N
N
N
N
N
AB-1 OS
DR-AB-10S-NS-3Q15
AB-10SL
DR-AB-10SL-NS-3Q15
AB-15S
Constituent
Fraction
CAS RN
Criteria Min
(range
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
-
NS
p /L
140
100 U
1200
100 U
140
Aluminum
T
7429-90-5
-
NS
p /L
530
600
3000
3500
13200
Antimony
D
7440-36-0
-
NS
p /L
1.6
0.24 J
11.6
1.6
2.7
Antimony
T
7440-36-0
-
1
IMAC
p /L
1.3
0.35 J
9.8
2.4
6.7
Arsenic
D
7440-38-2
-
NS
p /L
229
371
8.7
8.2
296
Arsenic
T
7440-38-2
-
10
02L
u /L
233
334 J+
9.6
16.2 J+
442
Barium
D
7440-39-3
--
NS
p /L
250
270
170
83
160
Barium
T
7440-39-3
-
700
02L
p /L
260
270
130
170
810
Beryllium
D
7440-41-7
--
NS
I p /L
0.17 J
0.2 U
0.14 J
0.2 U
0.23 J+
Beryllium
T
7440-41-7
--
4
IMAC
N /L
0.15 J
0.2 J
0.17 J
0.64
12.1
Boron
D
7440-42-8
-
NS
p /L
350
350
440
450
390
Boron
T
7440-42-8
--
700
02L
p /L
330
330
440
440
420
Cadmium
D
7440-43-9
-
NS
p /L
0.072 J
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
--
2
02L
p /L
0.058 J
0.08 U
0.033 J
0.073 J
1.3
Calcium
T
7440-70-2
--
NS
p /L
36900
38100
24500
21800
47800
Chromium
D
7440-47-3
--
NS
p /L
1.7
0.19 J
4.2
1.1
0.5 U
Chromium
T
7440-47-3
-
10
02L
p /L
1.3
1.1 J+
5.1
12.9
50
Cobalt
D
7440-48-4
-
NS
p /L
9.4
5.1
1.3
0.39 J
0.5 U
Cobalt
T
7440-48-4
--
1
IMAC
p /L
8.5
6.2
1.8
5.2
34.1
Copper
D
7440-50-8
-
NS
p /L
4.3
3.1
4.3
2.3
0.25 J+
Copper
T
7440-50-8
--
1000
02L
p /L
2.5
2.7
5
17.5
197
Iron
D
7439-89-6
-
NS
p /L
7500
7700 J+
760
50 UJ
50 U
Iron
T
7439-89-6
-
300
02L
p /L
7600
9700
2900
3800
5800
Lead
D
7439-92-1
-
NS
N /L
0.86
0.3
1.1
0.15
0.1 U
Lead
T
7439-92-1
-
15
02L
p /L
1 0.85
1.2
1.5
5.2
77.4
Magnesium
T
7439-95-4
-
NS
N /L
7070
7270
7050
7990
9480
Manganese
D
7439-96-5
-
NS
u /L
910
830
350
39
28
Manganese
T
7439-96-5
-
50
02L
p /L
860
840
250
150
170
Mercury
D
7439-97-6
-
NS
p /L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
-
1
02L
I N /L
0.2 U
0.2 UJ
0.2 U
0.2 UJ
0.08 J
Methane
N
74-82-8
-
NS
p /L
43.4
1.8 J+
30.3
21.8
40.1 J+
Molybdenum
D
7439-98-7
-
NS
N /L
14.5
16.6
17.3
19.1
21.5
Molybdenum
T
7439-98-7
-
NS
p /L
14.3
14.9
28.5
19.1
28.6
Nickel
D
7440-02-0
-
NS
N /L
5.8
3.3
5.2
4
0.96 J+
Nickel
T
7440-02-0
-
100
02L
p /L
5.4
4.6
5.9
11.2
70.1
Potassium
T
7440-09-7
-
NS
N /L
6790
6650
18000
31900
9340
Selenium
D
7782-49-2
-
NS
N /L
0.38 J
0.5 U
0.87
2.4
0.65
Selenium
T
7782-49-2
-
20
02L
p /L
0.24 J
0.5 U
1.1
3.3
12.2
Sodium
T
7440-23-5
-
NS
N /L
19500
17600
40800
51400
19200
Strontium
D
7440-24-6
-
NS
N /L
930
1100
370
270
770
Strontium
T
7440-24-6
-
NS
I p /L
950
1000
340
370
1100
Thallium
D
7440-28-0
-
NS
N /L
0.59
0.24
0.084 J
0.091 J
0.2
Thallium
T
7440-28-0
-
0.2
IMAC
p /L
0.54
0.31
0.1 U
0.44
3.4
Vanadium
D
7440-62-2
-
NS
N /L
4.1
0.67 J
11.8
8.2
45.4
Vanadium
T
7440-62-2
-
0.3
IMAC
p /L
3
3.3
14.6
30.7
254
Zinc
D
7440-66-6
--
NS
N /L
1 7.3 J
4.1 J
14
12
10 U
Zinc
T
7440-66-6
--
1000
02L
p /L
7.6 J
8.8 J
12
71
51
Total Dissolved Solids
N
TDS
--
500000
02L
N /L
226000
205000
239000
310000
226000
Total Organic Carbon
N
TOC
-
NS
p /L
1000 U
1000 U
1800
21300
510 J
Total Suspended Solids
N
TSS
-
NS
p /L
29100
71700
36600
134000
480000
Alkalinity, CO3
N
ALK-CO3
--
NS
p /L
5000 U
5000 U
5000 U
1600 J
5000 U
Alkalinity, HCO3
N
1 ALK-HCO3
-
NS
N /L
138000
121000
147000
135000
128000
Alkalinity, lab
N
ALK-LAB
--
NS
p /L
138000
121000
147000
136000
128000
Chloride
N
16887-00-6
-
250000
02L
I N /L
12500
11300
15900
18500
15900
Nitrogen, NO2 plus NO3
N
NO2-NO3
--
NS
I N /L
30
20 U
30
200
20 U
Page 1 of 4

Table 2-3 Ash Porewater Anal tical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
A113-10S
AB-10S
AB-10SL
AB-10SL
AB-15S
Round 1 (CSA Samplin
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
6/26/2015
9/11/2015
6/26/2015
9/11/2015
6/22/2015
N
N
N
N
N
AB-1 OS
DR-AB-10S-NS-3Q15
AB-10SL
DR-AB-10SL-NS-3Q15
AB-15S
Constituent
Fraction
CAS RN
Criteria Min
(range
Groundwater
Criteria
Criteria
Source
Unit
Sulfate
N
14808-79-8
-
250000
02L
p /L
24500
22300
29800
45200
39300
Sulfide
N
18496-25-8
-
NS
p /L
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
--
NS
p /L
183
0.654
As V
T
10103-60-3
--
NS
p /L
28.5
7.54
Chromium VI
T
18540-29-9
-
0.07
DHHS
p /L
0.006 J+
0.678
Fe II
T
1345-25-1
-
NS
p /L
7140
143
Fe III
T
1309-37-1
--
NS
p /L
688
71.3
Mn II
T
1344-43-0
-
NS
p /L
1050
194
Mn IV
T
1313-13-9
--
NS
p /L
1 UJ
202
Se IV
T
10102-18-8
--
NS
p /L
0.5 U
0.802
Se VI
T
13410-01-0
-
NS
p /L
1 0.5 U
0.388
Uranium, Natural
T
7440-61-1
--
NS
p /L
1.66
1.91
Radium-226
T
13982-63-3
-
NS
pCi/L
1.07
1.47
Radium-228
T
15262-20-1
-
NS
pCi/L
3 U
3 U
Uranium-233
T
13968-55-3
-
NS
p /L
0.05 U
0.05 U
Uranium-234
T
13966-29-5
-
NS
I N /L
0.05 U
0.05 U
Uranium-236
T
13982-70-2
-
NS
p /L
0.05 U
0.05 U
Dissolved Oxygen
N
DO
-
NS
m /L
6.3
0.1
2.13
1.2
0.15
Temp (Celcius)
N
TEMP
-
NS
Deg C
25
22.3
31.7
29.5
20.3
pH field
N
PH
6.5
8.5
02L
SU
6.46
6.7
8.61
8.9
8.51
Turbidity, field
N
TURB
--
NS
NTU
82.63
10
125.9
154.2
1 1000
Spec. Cond. field
N
SC
--
NS
PS/cm
369.2
369.7
393.2
466
263.3
Oxidation Reduction Potential
N
ORP
--
NS
mV
-3.9
-97.5
44.7
56
125.5
GW Depth TOC
N
JGW DEPTH-TOC
-
NS
ft
20
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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 4

Table 2-3 Ash Porewater Analvtical Results - Round 1 and Round 2
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-25S
AB-25S
A13-5S
A13-5S
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
6/26/2015
9/11/2015
6/19/2015
9/9/2015
N
N
N
N
AB-25S
DR-AB-25S-NS-3Q15
A13-5S
DR-AB-5S-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
-
NS
p /L
64 J
100 U
100 U
100 U
Aluminum
T
7429-90-5
-
NS
p /L
79 J
71800
84 J
100 U
Antimony
D
7440-36-0
-
NS
p /L
1.6
1.4
0.94 J+
1.6
Antimony
T
7440-36-0
-
1
IMAC
p /L
1.6
3.6
0.91
1.7
Arsenic
D
7440-38-2
-
NS
p /L
94.7
43.5
139
235
Arsenic
T
7440-38-2
-
10
02L
p /L
96.4
417
145
225
Barium
D
7440-39-3
--
NS
p /L
46
50
86
92
Barium
T
7440-39-3
--
700
02L
N /L
56
1100
91
92
Beryllium
D
7440-41-7
--
NS
p /L
0.2 U
0.2 U
0.2 U
1.5
Beryllium
T
7440-41-7
--
4
IMAC
N /L
0.2 U
7.2
0.2 U
1.6
Boron
D
7440-42-8
-
NS
p /L
580
620
320 J+
300
Boron
T
7440-42-8
--
700
02L
p /L
630
450
310
320
Cadmium
D
7440-43-9
-
NS
p /L
0.08 U
0.08 U
0.036 J
0.21
Cadmium
T
7440-43-9
--
2
02L
p /L
0.08 U
0.57
0.036 J
0.2
Calcium
T
7440-70-2
--
NS
p /L
37400
56100
59100
54700
Chromium
D
7440-47-3
--
NS
p /L
1 0.56 J+
0.48 J
1.7 J+
9.6
Chromium
T
7440-47-3
-
10
02L
p /L
0.47 J
363
4
11.3
Cobalt
D
7440-48-4
-
NS
p /L
0.15 J
0.22 J
27.1
25.8
Cobalt
T
7440-48-4
--
1
IMAC
p /L
0.16 J
109
28.2
25.3
Copper
D
7440-50-8
-
NS
p /L
0.72 J+
1.8
0.37 J+
30.4
Copper
T
7440-50-8
--
1000
02L
p /L
1 U
151
0.49 J
33.8
Iron
D
7439-89-6
-
NS
p /L
29 J
50 U
22800
30300
Iron
T
7439-89-6
-
300
02L
p /L
74
98900
25100
29700
Lead
D
7439-92-1
-
NS
N /L
0.058 J+
0.17
0.1 U
8.6
Lead
T
7439-92-1
-
15
02L
p /L
0.049 J
62.2
0.15
11.1
Magnesium
T
7439-95-4
--
NS
N /L
6020
13200
11100
10700
Manganese
D
7439-96-5
-
NS
p /L
70
85
1500
1500
Manganese
T
7439-96-5
--
50
02L
p /L
72
3400
1500
1400
Mercury
D
7439-97-6
-
NS
p /L
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
--
1
02L
p /L
0.2 U
0.28
0.2 U
0.2 U
Methane
N
74-82-8
--
NS
p /L
44
49.3
29.4 J+
29.8
Molybdenum
D
7439-98-7
--
NS
p /L
68.3
65.2
20.1
19.5
Molybdenum
T
7439-98-7
-
NS
I p /L
71.3
15.7
20.9
19.5
Nickel
D
7440-02-0
-
NS
p /L
2
6.9
21.4
25.6
Nickel
T
7440-02-0
--
100
02L
p /L
2
238
24.9
26.4
Potassium
T
7440-09-7
-
NS
N /L
6120
6750
13000
13100
Selenium
D
7782-49-2
--
NS
p /L
0.66
0.3 J
0.5 U
1.8
Selenium
T
7782-49-2
-
20
02L
p /L
0.74
30.4
0.5 U
2.5
Sodium
T
7440-23-5
--
NS
p /L
28800
23200
14900
14600
Strontium
D
7440-24-6
-
NS
N /L
650
750
1300
1200
Strontium
T
7440-24-6
--
NS
p /L
790
1200
1300
1200
Thallium
D
7440-28-0
--
NS
p /L
0.043 J
0.018 J
0.65
1.6
Thallium
T
7440-28-0
-
0.2
IMAC
u /L
1 0.043 J
1.5
0.69
1.6
Vanadium
D
7440-62-2
--
NS
p /L
13.2
12.6
1 U
31.7
Vanadium
T
7440-62-2
-
0.3
IMAC
u /L
13.3
689
0.62 J
33.7
Zinc
D
7440-66-6
--
NS
N /L
6.1 J
10 U
8.5 J
21
Zinc
T
7440-66-6
--
1000
02L
p /L
10 U
220
17
10
Total Dissolved Solids
N
TDS
--
500000
02L
N /L
243000
245000
358000
335000
Total Organic Carbon
N
TOC
--
NS
u /L
930 J
1000
570 J
1000 U
Total Suspended Solids
N
TSS
--
NS
N /L
5000
376000
25800
43200
Alkalinity, CO3
N
ALK-CO3
--
NS
p /L
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
--
NS
p /L
85600
94000
89200
70600
Alkalinity, lab
N
ALK-LAB
--
NS
u /L
85600
94000
89200
70600
Chloride
N
16887-00-6
-
250000
02L
p /L
14800
17400
11100
10900
Nitrogen, NO2 plus NO3
N
NO2-NO3
--
NS
N /L
20 U
140
20 U
33
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 3 of 4

Table 2-3 Ash Porewater Anal tical Results - Round 1 and Round 2
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-25S
AB-25S
A13-5S
A13-5S
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
6/26/2015
9/11/2015
6/19/2015
9/9/2015
N
N
N
N
AB-25S
DR-AB-25S-NS-3Q15
A13-5S
DR-AB-5S-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
Groundwater
Criteria
Criteria
Source
Unit
Sulfate
N
14808-79-8
-
250000
02L
p /L
74700
81100
125000
126000
Sulfide
N
18496-25-8
-
NS
p /L
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
-
NS
p /L
54.2
As V
T
10103-60-3
-
NS
N /L
43.2
Chromium VI
T
18540-29-9
-
0.07
DHHS
p /L
0.023 J+
Fe II
T
1345-25-1
-
NS
p /L
17
Fe III
T
1309-37-1
--
NS
p /L
20 U
Mn II
T
1344-43-0
-
NS
p /L
79.2
Mn IV
T
1313-13-9
--
NS
p /L
1 UJ
Se IV
T
10102-18-8
-
NS
p /L
0.485
Se VI
T
13410-01-0
-
NS
I p /L
0.5 U
Uranium, Natural
T
7440-61-1
-
NS
N /L
3.43
Radium-226
T
13982-63-3
-
NS
pCi/L
1.58
Radium-228
T
15262-20-1
-
NS
pCi/L
3 U
Uranium-233
T
13968-55-3
-
NS
N /L
0.05 U
Uranium-234
T
13966-29-5
-
NS
p /L
0.05 U
Uranium-236
T
13982-70-2
-
NS
p /L
0.05 U
Dissolved Oxygen
N
DO
-
NS
m /L
0.47
0.54
0.16
0.1
Temp Celcius)
N
TEMP
-
NS
Deg C
24.3
25.7
17.3
22.5
pH field
N
PH
6.5
8.5
02L
SU
8.21
8.33
6.6
6.4
Turbidity, field
N
TURB
--
NS
NTU
1 4.4
34.36
7.1
7.5
Spec. Cond. field
N
SC
-
NS
I NS/cm
387
411.3
478
552
Oxidation Reduction Potential
N
ORP
-
NS
mV
190
10.3
-72
-73
GW Depth TOC
N
JGW DEPTH-TOC
-
NS
ft
47.65
13.15
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
Dan River Steam Station Ash Basin
Page 4 of 4

Table 2-4 Ash Basin Water Analytical Results - Round 1 and Round 2
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-1
SW-1
SW-9
SW-9
Round 1
Round 2
Round 1
Round 2
5/27/2015
9/11/2015
5/27/2015
9/11/2015
N
N
N
N
SW-1
DR-SW-1-NS-3Q15
SW-9
DR-SW-9-NS-3Q15
Constituent
CAS RN
Fractio
SWQS Criteria
NCDEQ 02B
GWQS Criteria
NCDEQ 02L
Unit
Aluminum
7429-90-5
D
-
ug/I
43
100 U
5 U
100 U
Aluminum
7429-90-5
T
87
ug/I
1 613
100 U
129
360
Antimony
7440-36-0
D
-
ug/I
1.02
1.1
1 U
0.58
Antimony
7440-36-0
T
640
1
ug/I
1.21
0.97
1 U
0.72
Arsenic
7440-38-2
D
150
-
ug/I
13.8
31.8
46.3
59
Arsenic
7440-38-2
T
10
10
ug/I
15.5
37.9
51.1
75.9
Barium
7440-39-3
D
-
ug/I
20
110
88
92
Barium
7440-39-3
T
200000
700
ug/I
18
120
99
120
Beryllium
7440-41-7
D
6.5
-
ug/I
1 1 U
0.2 U
1 U
0.2 U
Beryllium
7440-41-7
T
-
4
ug/I
1 U
0.2 U
1 U
0.11 J
Boron
7440-42-8
D
-
ug/I
180
180
360
380
Boron
7440-42-8
T
-
700
ug/I
157
190
364
400
Cadmium
7440-43-9
D
0.15
-
ug/I
1 U
0.08 U
1 U
0.08 U
Cadmium
7440-43-9
T
-
2
ug/I
1 U
0.08 U
1 U
0.08 U
Calcium
7440-70-2
T
-
ug/I
19700
20800
45400
51600
Chromium
7440-47-3
D
11
ug/1
1 U
0.25 J
1 U
0.45 J
Chromium
7440-47-3
T
-
10
ug/I
1 U
0.26 J
1 U
1
Cobalt
7440-48-4
D
-
-
ug/I
1 U
0.5 U
1 U
0.5 U
Cobalt
7440-48-4
T
4
1
ug/I
1 U
0.22 J
1 U
0.74
Copper
7440-50-8
D
1
2.7
-
ug/I
3.39 J+
0.52 J
1 U
0.23 J
Copper
7440-50-8
T
-
1000
ug/I
4.75
0.3 J
5.11 J+
1.7
Iron
7439-89-6
D
-
ug/I
1 21
50 U
10 U
50 U
Iron
7439-89-6
T
-
300
ug/I
323
220
140
550
Lead
7439-92-1
D
0.54
ug/I
1 U
0.22
1 U
0.1 U
Lead
7439-92-1
T
-
15
ug/I
1 U
0.06 J
1 U
0.83
Magnesium
7439-95-4
T
-
ug/l
7240
6680
13500
14300
Manganese
7439-96-5
D
I
-
ug/I
16
59
35
5 U
Manganese
7439-96-5
T
-
50
ug/I
9
140
154
230
Mercury
7439-97-6
T
0.012
1
ug/I
I 0.0011 J+
0.00778
0.000949 J+
0.0011 J+
Methane
74-82-8
N
-
-
ug/I
10 UJ
15
10 UJ
16.4
Molybdenum
7439-98-7
D
-
ug/I
9.11
10.8
7.62
9.4
Molybdenum
7439-98-7
T
2000
ug/I
9.36
9.7
7.65
9.8
Nickel
7440-02-0
D
16
-
ug/I
1.2
1.6
1 U
0.7
Nickel
7440-02-0
T
I
-
100
ug/I
2.5
1.6
1.16
1.6
Potassium
7440-09-7
T
-
ug/I
3090
5540
4690
5840
Selenium
7782-49-2
D
-
-
ug/I
1 2.32
1.9
1 U
0.36 J
Selenium
7782-49-2
T
5
20
ug/I
2.87
2
1 U
0.45 J
Sodium
7440-23-5
T
-
-
ug/I
11500
8890
17000
18700
Strontium
7440-24-6
D
-
ug/I
322
290
883
1000
Strontium
7440-24-6
T
40000
ug/I
320
300
895
1100
Thallium
7440-28-0
D
I
-
-
ug/I
0.2 U
0.021 J
0.2 U
0.017 J
Thallium
7440-28-0
T
0.47
0.2
ug/I
0.2 U
0.019 J
0.2 U
0.035 J
Vanadium
7440-62-2
D
-
ug/I
4.94
2.4
0.701
1.1
Vanadium
7440-62-2
T
-
0.3
ug/I
6.65
2.5
0.947
2.7
Zinc
7440-66-6
D
36
ug/I
34 J+
10 U
18 J+
10 U
Zinc
7440-66-6
T
-
1000
ug/I
212
10 U
10
16
Total Dissolved Solids
TDS
N
500000
ug/I
140000
136000
270000
290000
Total Organic Carbon
TOC
N
ug/I
3800
4500
2100
1600
Total Suspended Solids
TSS
N
ug/I
1 16000
3500
32000
35200
Alkalinity, CO3
ALK-CO3
N
ug/I
11000
5000 U
10000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
ug/I
23000
45400
100000
114000
Alkalinity, lab
ALK-LAB
N
ug/I
37000
45400
100000
114000
Chloride
16887-00-6
N
230000
250000
ug/I
11000
8900
13000
14500
Nitrite as N
14797-65-0
N
-
1000
ug/I
29
-
132
-
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
ug/I
-
-
-
210 J-
Sulfate
14808-79-8
N
250000
ug/I
1 53000
40200
90000
90300
Sulfide
18496-25-8
N
-
ug/I
100 U
100 U
100 U
100 U
Dissolved Oxygen
DO
N
mg/I
-
2.5
-
7.8
Temperature
TEMP
N
-
Deg C
27.4
28.5
pH
PH
N
6
9
6.5
8.5
SU
7.3
7.6
Turbidity, field
TURB
N
-
-
NTU
5.61
17.9
Specific Conductivity (field)
SC
I N
PS/cm
219.1
453.9
Oxidation Reduction Potential
ORP
I N
mV
125.7
90.3
Page 1 of 2

Table 2-4 Ash Basin Water Analytical Results - Round 1 and Round 2
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-1
SW-1
SW-9
SW-9
Round 1
Round 2
Round 1
Round 2
5/27/2015
9/11/2015
5/27/2015
9/11/2015
N
N
N
N
SW-1
DR-SW-1-NS-3Q15
SW-9
DR-SW-9-NS-3Q15
Constituent CAS RN I Fractio I SWQS Criteria I NCDEQ 02B I GWQS Criteria I NCDEQ 02L I Unit
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
INS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 2

Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
BG-1 D
BG-1 D
BG-5D
BG-5D
BG-5D
BG-5D
BG-5S
BG-5S
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
11/16/2015
12/15/2015
6/23/2015
9/9/2015
11/16/2015
12/15/2015
6/24/2015
9/9/2015
N
N
N
N
N
N
N
N
DR-BG-ID-NS-4Q15-1
DR-BG-1D-NS-4Q15-2
BG-5D
DR-BG-5D-NS-3Q15
DR-BG-5D-NS-4Q15-1
DR-BG-5D-NS-4Q15-2
BG-5S
DR-BG-5S-NS-3015
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
1600
700
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
1000
760
60 J
220
100 U
100 U
590
720
Antimony
7440-36-0
D
/L
0.3 J
0.46 J
0.5 U
0.50 U
0.5 U
0.5 U
0.5 U
0.50 U
Antimony
7440-36-0
T
1
IMAC
Ng/L
0.46 J
0.6
0.5 U
0.50 U
0.5 U
0.5 U
0.5 U
0.50 U
Arsenic
7440-38-2
D
/L
2.1
2.2
0.17 J+
0.50 U
0.5 U
0.5 U
0.5 U
0.50 U
Arsenic
7440-38-2
T
10
02L
/L
2.4
2.3
0.5 U
0.50 U
0.5 U
0.5 U
0.28 J
0.29 J
Barium
7440-39-3
D
/L
3 J
5 U
24
19
17
15
10
12
Barium
7440-39-3
T
700
02L
/L
5 U
5 U
29
22
16
16
21
22
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.15 J
0.20 U
0.2 U
0.2 U
0.2 U
0.20 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
0.2 U
0.20 U
0.2 U
0.2 U
0.087 J
0.20 U
Boron
7440-42-8
D
/L
58
65
50 U
50 U
50 U
50 U
50 U
50 U
Boron
7440-42-8
T
700
02L
/L
69
58
50 U
50 U
50 U
50 U
50 U
50 U
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
0.032 J+
0.080 U
0.08 U
0.08 U
0.08 U
0.080 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
0.08 U
0.080 U
0.08 U
0.08 U
0.08 U
0.080 U
Calcium
7440-70-2
T
/L
66800
63600
32400
30700
25600
28300
17100
21000
Chromium
7440-47-3
D
/L
20.4
14.7
0.28 J+
0.50 U
0.72 J+
0.29 J
1.2 J+
0.29 J
Chromium
7440-47-3
T
10
02L
Ng/L
25.3
16.1
0.38 J+
0.47 J
0.48 J+
0.18 J+
2.6
0.89
Cobalt
7440-48-4
D
/L
0.32 J
0.3 J
0.91
0.30 J
0.5 U
0.5 U
0.5 U
0.50 U
Cobalt
7440-48-4
T
1
IMAC
Ng/L
0.38 J
0.33 J
1
0.41 J
0.5 U
0.5 U
2.1
0.91
Copper
7440-50-8
D
/L
3.8 J+
3.1
0.36 J+
0.47 J
9.8 J+
9.4
0.28 J+
0.39 J
Copper
7440-50-8
T
1000
02L
/L
2.6
2.3 J+
1 U
0.36 J
1 U
1 U
2 J+
0.45 J
Iron
7439-89-6
D
/L
50 U
50 U
150
220
50 U
50 U
50 U
50 U
Iron
7439-89-6
T
300
02L
Ng/L
31 J
50 U
240
510
81
50 U
890
1100
Lead
7439-92-1
D
/L
0.058 J+
0.19
0.1 U
0.049 J
1.2 J+
1
0.1 UJ
0.10 U
Lead
7439-92-1
T
15
02L
/L
0.1 U
0.047 J+
0.078 J
0.27
0.08 J
0.055 J
1.7
0.76
Magnesium
7439-95-4
T
/L
74.7 J
237
17400
16700
14900
15900
11500
14000
Manganese
7439-96-5
D
/L
5 U
5 U
920
540
110
120
21
20
Manganese
7439-96-5
T
50
02L
Ng/L
5 U
5 U
910
580
100
130
110
120
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.20 U
0.2 U
0.2 U
0.2 U
0.20 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
0.20 U
0.2 U
0.2 U
0.2 U
0.20 U
Methane
74-82-8
N
/L
2.2 J+
1.5 J+
5.4 J+
10.0 UJ
1.4 J+
2.3 J+
3.6 J+
1.4 J+
Molybdenum
7439-98-7
D
/L
13.2
14.9
1.2
0.58
0.32 J
0.15 J
0.5 U
0.50 U
Molybdenum
7439-98-7
T
/L
18
16.5
1.2
0.56
0.3 J
0.5 U
0.11 J
0.50 U
Nickel
7440-02-0
D
/L
0.18 J
0.37 J
2.3 J+
0.17 J
0.46 J
0.39 J
0.8 J+
0.42 J
Nickel
7440-02-0
T
100
02L
/L
0.4 J
1.9 J+
0.52 J+
0.36 J
0.24 J
0.5 U
2.4 J+
1.1
Potassium
7440-09-7
T
/L
6500
6360
3170 J
5000 U
5000 U
5000 U
5000 U
50001.1
Selenium
7782-49-2
D
/L
0.88
0.88
0.5 U
0.50 U
0.5 U
0.5 U
0.5 U
0.50 U
Selenium
7782-49-2
T
20
02L
/L
1.2
0.9
0.5 U
0.50 U
0.5 U
0.5 U
0.5 U
0.50 U
Sodium
7440-23-5
T
/L
32400
32900
15700
16400
16500
16700
16000
17900
Strontium
7440-24-6
D
/L
120
98
250
270
260
230
200
230
Strontium
7440-24-6
T
/L
100
110
300
280
230
250
220
240
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
0.1 U
0.10 U
0.1 U
0.1 U
0.1 U
0.10 U
Thallium
7440-28-0
T
0.2
IMAC
Ng/L
0.017 J
0.017 J
0.1 U
0.10 U
0.1 U
0.1 U
0.019 J
0.10 U
Vanadium
7440-62-2
D
/L
39.3
46.1
1 U
1.0 U
1 U
1 U
1 U
1.0 U
Vanadium
7440-62-2
T
0.3
IMAC
Ng/L
45.8
43
1 U
0.46 J
1 U
1 U
2.6
0.82 J
Zinc
7440-66-6
D
/L
12
10 U
10 U
3.1 J
10 U
10 U
10 UJ
5.5 J
Zinc
7440-66-6
T
1000
02L
/L
10 U
10 J+
10 U
10 U
3.3 J+
6 J
5.1 J+
5.1 J
Total Dissolved Solids
TDS
N
500000
02L
/L
309000
338000
214000
212000
164000
204000
175000
191000
Total Organic Carbon
TOC
N
/L
1800
2000
620 J
1000 U
1000 U
23800
570 J
1000 U
Total Suspended Solids
TSS
N
/L
2500 U
10800
2900
5200
2500 U
2500 U
62900
Alkalinity, CO3
ALK-CO3
N
/L
81600
85000
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
74200
5000 U
133000
126000
115000
125000
77600
80800
Alkalinity, lab
ALK-LAB
N
/L
156000
117000
133000
126000
115000
125000
77600
80800
Chloride
16887-00-6
N
250000
02L
/L
6400
6600
5700
5400
6000
6000
6900
6700
Nitrite as N
14797-65-0
N
1000
02L
/L
Nitro en, NO2 plus NO3
NO2-NO3
N
/L
310
300
26 J+
140
180
120
400 J+
360
Sulfate
14808-79-8
N
250000
02L
/L
86800
92400
39400
34900
34500
34300
41300
38700
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
Iron
7439-89-6
T
300
02L
Ng/L
Manganese
7439-96-5
D
/L
Manganese
7439-96-5
T
50
02L
Ng/L
As III
7784-46-5
T
/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
T
0.07
DHHS
Ng/L
24.9
16.9
0.024 J+
0.03 J
Fe II
1345-25-1
T
/L
Fe III
1309-37-1
T
/L
Mn II
1344-43-0
T
/L
Page 1 of 8

Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
BG-1 D
BG-1 D
BG-5D
BG-5D
BG-5D
BG-5D
BG-5S
BG-5S
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
11/16/2015
12/15/2015
6/23/2015
9/9/2015
11/16/2015
12/15/2015
6/24/2015
9/9/2015
N
N
N
N
N
N
N
N
DR-BG-ID-NS-4Q15-1
DR-BG-1D-NS-4Q15-2
BG-5D
DR-BG-5D-NS-3Q15
DR-BG-5D-NS-4Q15-1
DR-BG-5D-NS-4Q15-2
BG-5S
DR-BG-5S-NS-3015
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Mn IV
1313-13-9
T
/L
Se IV
10102-18-8
T
/L
Se VI
13410-01-0
T
/L
Uranium, Natural
7440-61-1
T
/L
1.13
0.135 J
Radium-226
13982-63-3
T
Ci/L
0.897
1.22
Radium-228
15262-20-1
T
Ci/L
1.46
3 U
Uranium-233
13968-55-3
T
Ijq1L
1
0.05 U
0.05 U
Uranium-234
13966-29-5
T
/L
0.05 U
0.05 U
Uranium-236
13982-70-2
T
/L
0.05 U
0.05 U
Dissolved Oxygen
DO
N
m /L
3.89
0.27
0.3
0.28
1.1
Temperature
TEMP
N
Deg C
13.1
18.7
21.3
16
16.8
pH
PH
N
6.5
8.5
02L
SU
11.4
7.06
7
6.69
6.2
Turbidity, field
TURB
N
NTU
0.85
3.81
7
1.05
4
Specific Conductivityfield
SC
NPS/cm
632
358
344.2
315.2
271.3
Oxidation Reduction Potential
ORP
N
mV
37.3
218.2
-52.3
54.9
202.3
GW Depth TOC
GW DEPTH-TOCI
N
I
I ft
1 16.06
8.82
7.15
10.22
Notes:
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 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
BG-5S
BG-5S
GWA-12D
GWA-12D
GWA-12D
GWA-12D
GWA-12S
GWA-12S
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
11/16/2015
12/15/2015
6/4/2015
9/9/2015
11/19/2015
12/15/2015
6/4/2015
9/11/2015
N
N
N
N
N
N
N
N
DR-BG-5S-NS-4Q15-1
DR-BG-5S-NS-4Q15-2
GWA-12D
DR-GWA-12D-NS-3Q15
DR-GWA-12D-NS-4Q15-1DR-GWA-I2D-NS-4Q15-i
GWA-12S
DR-GWA-I2S-NS-3Q15
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
140
92 J
298
100 U
100 U
100 U
21
100 U
Aluminum
7429-90-5
T
/L
130
100 U
5 U
81 J
100
51 J
190
350
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
1 U
0.16 J
0.18 J
0.5 U
1 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
Ng/L
0.5 U
0.5 U
1 U
0.19 J
0.18 J
0.5 U
1 U
0.5 U
Arsenic
7440-38-2
D
/L
0.5 U
0.5 U
2.54
2.3
2.1
2.1
1 U
0.14 J
Arsenic
7440-38-2
T
10
02L
/L
0.5 U
0.5 U
3.71
2.7
2.2
2.2
1 U
0.16 J
Barium
7440-39-3
D
/L
11
10
23
16
22
19
53
46
Barium
7440-39-3
T
700
02L
/L
12
11
17
16
22
21
55
54
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
1 U
0.2 U
0.2 U
0.2 U
1 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
1 U
0.2 U
0.2 U
0.2 U
1 U
0.2 U
Boron
7440-42-8
D
/L
50 U
50 U
50 U
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 U
50 U
50 U
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
1 U
0.08 U
0.08 U
0.08 U
1 U
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
1 U
0.08 U
0.08 U
0.08 U
1 U
0.08 U
Calcium
7440-70-2
T
/L
17600
17200
51700
54700
52000
48900
12200
10100
Chromium
7440-47-3
D
/L
0.54 J+
0.62
1 U
0.23 J
0.28 J
0.17 J
1 U
0.48 J
Chromium
7440-47-3
T
10
02L
Ng/L
1 J+
0.73 J+
2.87
0.43 J+
0.42 J
0.21 J
1.01
1.4
Cobalt
7440-48-4
D
/L
0.5 U
0.5 U
1 U
0.31 J
0.16 J
0.5 U
1 U
0.24 J
Cobalt
7440-48-4
T
1
IMAC
Ng/L
0.5 U
0.5 U
1 U
0.35 J
0.13 J
0.5 U
1 U
0.49 J
Copper
7440-50-8
D
/L
9.6 J+
1.8
3.32
1 U
1 U
1 U
1 UJ
0.57 J
Copper
7440-50-8
T
1000
02L
/L
1 U
1 U
3.9 J+
0.52 J
0.42 J
0.26 J
1 U
1.3
Iron
7439-89-6
D
/L
50 U
35 J
386
30 J
62
97
10 U
50 U
Iron
7439-89-6
T
300
02L
Ng/L
140
27 J
54
100
140
130
185
460
Lead
7439-92-1
D
/L
1.1 J+
0.18
1 U
0.16
0.063 J
0.1 U
1 U
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.14
0.05 J
1.74
0.081 J
0.13
0.1 U
1 U
0.24
Magnesium
7439-95-4
T
/L
11400
11300
16400
18000
16700
16200
5960
6070
Manganese
7439-96-5
D
/L
3.2 J
5 U
60
37
36
34
102
31
Manganese
7439-96-5
T
50
02L
Ng/L
16
5 U
49
40 J+
37
36
150
45
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.05 U
0.2 U
0.2 U
0.2 U
0.05 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.05 U
0.2 U
0.2 U
0.2 U
0.05 U
0.2 U
Methane
74-82-8
N
/L
2.5 J+
2.3 J+
10 U
1.8 J+
1.9 J+
4.1 J+
10 U
1.8 J+
Molybdenum
7439-98-7
D
/L
0.5 U
0.5 U
1.26
0.82
0.63
0.42 J
1 U
0.5 U
Molybdenum
7439-98-7
T
/L
0.5 U
0.5 U
1.52
0.8
0.56
0.34 J
1 U
0.11 J
Nickel
7440-02-0
D
/L
0.58
0.58
1 U
3
1.2
0.68
2.14
2.9
Nickel
7440-02-0
T
100
02L
/L
0.59
0.64
3.37
3.4
0.77
0.33 J
3.09
3.4
Potassium
7440-09-7
T
/L
5000 U
5000 U
1000
5000 U
5000 U
5000 U
1690
5000 U
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
1 U
0.5 U
0.5 U
0.5 U
1 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.5 U
1 U
0.5 U
0.5 U
0.5 U
1 U
0.5 U
Sodium
7440-23-5
T
/L
16700
16300
9470
9730
9060
8410
7920
7010
Strontium
7440-24-6
D
/L
210
180
533
520
580
520
140
140
Strontium
7440-24-6
T
/L
200
200
526
520
580
560
140
140
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
0.2 U
0.1 U
0.038 J
0.1 U
0.2 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
Ng/L
0.1 U
0.1 U
0.2 U
0.1 U
0.1 U
0.1 U
0.2 U
0.1 U
Vanadium
7440-62-2
D
/L
1 U
1 U
2.75
3
3.7
3.2
0.3 U
0.7 J
Vanadium
7440-62-2
T
0.3
IMAC
Ng/L
0.31 J
0.3 J
5.65
3.7
3.1
2.3
0.3 U
0.93 J
Zinc
7440-66-6
D
/L
4.4 J
4.4 J
14
2.9 J
16
8.6 J
6
5.1 J
Zinc
7440-66-6
T
1000
02L
/L
7.2 J+
10 U
5 UJ
12
10 U
3.7 J+
5 UJ
5.9 J
Total Dissolved Solids
TDS
N
500000
02L
/L
151000
187000
250000
257000
265000
261000
110000
105000
Total Organic Carbon
TOC
N
/L
25800
550 J
202 J+
1000 U
1000 U
1000 U
697 J+
710 J
Total Suspended Solids
TSS
N
/L
2500 U
2500 U
16000
7200
2600 U
2500 U
5000 U
3000
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
10000 U
5000 U
5000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
75100
70600
190000
196000
192000
174000
28000
11900
Alkalinity, lab
ALK-LAB
N
/L
75100
70600
190000
196000
192000
174000
28000
11900
Chloride
16887-00-6
N
250000
02L
/L
6800
6900
3900
3300
3700
3800
3000
1700
Nitrite as N
14797-65-0
N
1000
02L
/L
178
808
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
440
430
170
86
83
580
Sulfate
14808-79-8
N
250000
02L
/L
37600
36700
16000
15300
18700
18500
41000
46100
Sulfide
18496-25-8
N
/L
100 U
100 U
500 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
Iron
7439-89-6
T
300
02L
Ng/L
Manganese
7439-96-5
D
/L
Manganese
7439-96-5
T
50
02L
Ng/L
As III
7784-46-5
T
/L
As V
10103-60-3
1 T
/L
Chromium VI
18540-29-9
T
0.07
DHHS
Ng/L
0.35
0.41
0.021 J
Fe II
1345-25-1
T
/L
Fe III
1309-37-1
T
/L
Mn II
1344-43-0
T
/L
Page 3 of 8

Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
BG-5S
BG-5S
GWA-12D
GWA-12D
GWA-12D
GWA-12D
GWA-12S
GWA-12S
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
11/16/2015
12/15/2015
6/4/2015
9/9/2015
11/19/2015
12/15/2015
6/4/2015
9/11/2015
N
N
N
N
N
N
N
N
DR-BG-5S-NS-4Q15-1
DR-BG-5S-NS-4Q15-2
GWA-12D
DR-GWA-12D-NS-3Q15
DR-GWA-12D-NS-4Q15-1DR-GWA-I2D-NS-4Q15-i
GWA-12S
DR-GWA-I2S-NS-3Q15
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Mn IV
1313-13-9
T
/L
Se IV
10102-18-8
T
/L
Se VI
13410-01-0
T
/L
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
Ijq1L
Uranium-234
13966-29-5
T
/L
Uranium-236
13982-70-2
T
/L
Dissolved Oxygen
DO
N
m /L
0.88
0.47
0.44
0.5
1.2
4.85
5.34
Temperature
TEMP
N
Deg C
16.1
17.7
20.7
17.8
16.6
18.3
23.4
pH
PH
N
6.5
8.5
02L
SU
6.2
7.47
7.4
7.4
7.6
5.45
5.6
Turbidity, field
TURB
N
NTU
3.07
8.35
4.9
7.13
2.5
1 2.38
87.1
Specific Conductivity field
SC
N
S/cm
256.4
396.7
526
385.3
371.6
151.3
257.4
Oxidation Reduction Potential
ORP
N
mV
1 158.3
-81.4
-19.7
-69.7
-79.9
1 321
242.7
GW Depth TOC
GW DEPTH-TOCI
N
I ft
1 7.2
34.69
19.1
16.76
Notes:
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 Ja
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 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-12S
GWA-9D
GWA-9D
GWA-9D
GWA-9D
GWA-9S
GWA-9S
GWA-9S
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
Round 3
12/18/2015
6/15/2015
9/9/2015
11/16/2015
12/15/2015
6/19/2015
9/9/2015
11/16/2015
N
N
N
N
N
N
N
N
DR-GWA-12S-NS-4Q15-2
GWA-9D
DR-GWA-9D-NS-3Q15
DR-GWA-9D-NS-4Q15-1
DR-GWA-9D-NS-4Q15-2
GWA-9S
DR-GWA-9S-NS-3Q15
DR-GWA-9S-NS-4Q15-1
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
g/L
100 U
10 U
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
wqlL
1 560
1270
100 U
210
100 U
4300
630
300
Antimony
7440-36-0
D
/L
0.2 J
0.5 U
0.5 U
0.5 U
0.5 U
0.19 J
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
Ng/L
0.19 J
0.5 U
0.5 U
0.5 U
0.5 U
0.22 J
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
0.5 U
2.1
0.69
0.77
0.74
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
T
10
02L
/L
0.48 J
2.3
0.67
0.84
0.84
0.63
0.5 U
0.5 U
Barium
7440-39-3
D
/L
34
24
20
14
12
5 U
10
11
Barium
7440-39-3
T
700
02L
/L
41
23
21
15
13
42
17
14
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.077 J
0.21
0.18 J
Beryllium
7440-41-7
T
4
IMAC
/L
0.081 J
0.085 J
0.2 U
0.2 U
0.2 U
0.67
0.23
0.21
Boron
7440-42-8
D
/L
50 U
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Boron
7440-42-8
T
700
02L
/L
50 U
50 U
50 U
38 J
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
0.08 U
0.038 J
0.027 J
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.036 J
0.034 J
0.053 J
Calcium
7440-70-2
T
/L
7210
17700
14200
8270
7150
1050
584
835 J+
Chromium
7440-47-3
D
/L
0.65 J+
0.25 J
0.34 J
0.5 U
0.5 U
0.27 J+
0.57
0.49 J+
Chromium
7440-47-3
T
10
02L
Ng/L
3.4
2.9
1.2 J+
2.5 J+
1.4 J+
3.5
0.97 J+
0.82 J+
Cobalt
7440-48-4
D
/L
0.26 J
0.51
0.36 J
0.76
0.81
1.5
4.5
5.5
Cobalt
7440-48-4
T
1
IMAC
Ng/L
0.47 J
1.2
0.38 J
0.9
0.88
9.3
4.7
6.7
Copper
7440-50-8
D
/L
2.8 J+
1 U
1.9
0.6 J+
0.72 J+
1 UJ
5
9.2 J+
Copper
7440-50-8
T
1000
02L
/L
1.4 J+
2.1 J+
1 U
0.4 J
0.47 J
4.5 J+
1.4
1.5
Iron
7439-89-6
D
/L
50 U
1390
1800
2000
2100
50 U
50 U
50 U
Iron
7439-89-6
T
300
02L
Ng/L
890
3290
2000
2600
2300
5100
750
290
Lead
7439-92-1
D
/L
0.23
0.1 U
0.13
0.085 J+
0.12 J+
0.1 U
0.51
0.95 J+
Lead
7439-92-1
T
15
02L
/L
0.35
0.67 J+
0.1 U
0.32
0.14
4.3
0.38
0.39
Magnesium
7439-95-4
T
/L
4370
3050
2620
2260
2030
890
558
753
Manganese
7439-96-5
D
/L
27
590
690
660
480
36
100
140
Manganese
7439-96-5
T
50
02L
Ng/L
37
640
720
620
530
220
110
140
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
0.072 J
0.2 U
0.2 U
0.2 U
0.073 J+
0.2 U
0.2 U
Methane
74-82-8
N
/L
3.2 J+
10 U
3 J+
2.6 J+
1.9 J+
2.3 J+
2.7 J+
1.7 J+
Molybdenum
7439-98-7
D
/L
0.5 U
0.27 J
0.12 J
0.21 J
0.5 U
0.5 U
0.5 U
0.5 U
Molybdenum
7439-98-7
T
/L
0.1 J
0.52
0.12 J
0.27 J
0.5 U
0.3 J
0.5 U
0.5 U
Nickel
7440-02-0
D
/L
2.8
1.2 J+
0.98
2.4
2
0.66 J+
2.9
3.1
Nickel
7440-02-0
T
100
02L
/L
3.7
3.2 J+
1.2
3.7
2.5
6.1 J+
2.9
3.9
Potassium
7440-09-7
T
/L
5000 U
5000 U
5000 U
5000 U
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
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.26 J
0.5 U
0.5 U
0.5 U
0.5 U
0.56
0.5 U
0.5 U
Sodium
7440-23-5
T
/L
5630
6140
5510
5000
4850 J
6980
5390
5960
Strontium
7440-24-6
D
/L
94
63
52
33
25
3.1 J
8.1
9.5
Strontium
7440-24-6
T
/L
100
64
55
31
27
21
9.1
9.3
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
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
Ng/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.034 J
0.1 U
0.1 U
Vanadium
7440-62-2
D
/L
0.42 J
1 U
1 U
1 U
1 U
1 U
1 U
1 U
Vanadium
7440-62-2
T
0.3
IMAC
Ng/L
2.4 J+
1.8
1 U
0.38 J
0.39 J
5.1
0.59 J
0.65 J
Zinc
7440-66-6
D
/L
16
3.9 J+
10 U
8.7 J
3.1 J
5.1 J+
12
13
Zinc
7440-66-6
T
1000
02L
/L
6.9 J
8.9 J+
10 U
12 J+
16
20
16
11 J+
Total Dissolved Solids
TDS
N
500000
02L
/L
87000
113000
91000
42000
90000
161000
50000
36000
Total Organic Carbon
TOC
N
/L
1300
1000 U
17500
1000 U
1000 U
14200
1000 U
1000 U
Total Suspended Solids
TSS
N
/L
2500 U
16100
5000 U
5800
5900
239000
30200
6900
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
10000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
6000
57000
47600
32000
25400
9100
5700
4900 J
Alkalinity, lab
ALK-LAB
N
/L
6000
57000
47600
32000
25400
9100
5700
4900 J
Chloride
16887-00-6
N
250000
02L
/L
2700
2000
2100
2900
3100
4200
4000
4100
Nitrite as N
14797-65-0
N
1000
02L
/L
Nitro en, NO2 plus NO3
NO2-NO3
N
/L
790
20 U
20 U
20 U
20 U
48
36
31
Sulfate
14808-79-8
N
250000
02L
Ijq1L
32400
4200
4300
6000
6000
650 J
2700
6400
Sulfide
18496-25-8
N
/L
100 U
500 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
Iron
7439-89-6
T
300
02L
Ng/L
Manganese
7439-96-5
D
/L
Manganese
7439-96-5
T
50
02L
Ng/L
As III
7784-46-5
T
/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
T
0.07
DHHS
Ng/L
0.26
0.03 U
0.03 U
0.083
Fe II
1345-25-1
T
/L
Fe III
1309-37-1
T
/L
Mn II
1344-43-0
1 T
/L
Page 5 of 8

Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-12S
GWA-9D
GWA-9D
GWA-9D
GWA-9D
GWA-9S
GWA-9S
GWA-9S
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
Round 3
12/18/2015
6/15/2015
9/9/2015
11/16/2015
12/15/2015
6/19/2015
9/9/2015
11/16/2015
N
N
N
N
N
N
N
N
DR-GWA-12S-NS-4Q15-2
GWA-9D
DR-GWA-9D-NS-3Q15
DR-GWA-9D-NS-4Q15-1
DR-GWA-9D-NS-4Q15-2
GWA-9S
DR-GWA-9S-NS-3Q15
DR-GWA-9S-NS-4Q15-1
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Mn IV
1313-13-9
T
/L
Se IV
10102-18-8
T
/L
Se VI
13410-01-0
T
/L
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
Ijq1L
Uranium-234
13966-29-5
T
/L
Uranium-236
13982-70-2
T
/L
Dissolved Oxygen
DO
N
m /L
0.16
0.12
0.31
0.5
4.17
4.52
1.61
Temperature
TEMP
N
Deg C
26.1
16.7
18.2
14.5
23.8
19
16.3
pH
PH
N
6.5
8.5
02L
SU
6.4
6.2
6.1
5.8
5.55
5.1
5.3
Turbidity, field
TURB
N
NTU
16.28
0.9
9.97
1.9
235.9
1 7.2
1 9.24
Specific Conductivity field
Sc
NPS/cm
1
141.9
157.4
89.6
84.4
39.3
1 48.1
1 45.2
Oxidation Reduction Potential
I ORP
N
mV
1
90.8
69.8
1.5
42
331.5
1 287
1 241.6
GW Depth TOC
GW DEPTH-TOCI
N
I ft
34.66
28.1
34.58
Notes:
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 Ja
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 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-9S
MW-23BR
MW-23BR
MW-23BR
MW-23D
MW-23D
Round 4
Round 1
Round 2
Round 4
Round 1
Round 4
12/15/2015
6/1/2015
9/10/2015
12/15/2015
6/30/2015
12/15/2015
N
N
N
N
N
N
DR-GWA-9S-NS-4Q15-2
MW-23BR
DR-MW-23BR-NS-3Q15
R-MW-23BR-NS-4Q15-:
MW-23D
DR-MW-23D-NS-4Q15-2
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
85 J
75
100 U
100 U
100 U
88 J
Aluminum
7429-90-5
T
/L
300
8
100 U
66 J
180
100 U
Antimony
7440-36-0
D
/L
0.5 U
1.16
0.50 U
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
Ng/L
0.5 U
1.21
0.50 U
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
0.5 U
6.29
1.2
0.69
0.33 J
0.3 J
Arsenic
7440-38-2
T
10
02L
/L
0.5 U
6.36
1.1
0.65
0.27 J
0.33 J
Barium
7440-39-3
D
/L
11
132
120
110
94
72
Barium
7440-39-3
T
700
02L
/L
14
136
120
120
80
16
Beryllium
7440-41-7
D
/L
0.18 J
1 U
0.20 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.19 J
1 U
0.20 U
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
/L
50 U
50 U
28 J
32 J
50 U
50 U
Boron
7440-42-8
T
700
02L
/L
50 U
50 U
29 J
50 U
50 U
50 U
Cadmium
7440-43-9
D
/L
0.04 J
1 U
0.080 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.037 J
1 U
0.080 U
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
/L
1130
53700
48500
54500
61100
59000
Chromium
7440-47-3
D
/L
0.23 J+
1 U
0.25 J
0.21 J
0.22 J
0.34 J
Chromium
7440-47-3
T
10
02L
Ng/L
0.58 J+
1 U
0.50 U
0.5 U
0.26 J+
1.5
Cobalt
7440-48-4
D
/L
6.7
1 U
0.50 U
0.5 U
0.22 J
0.18 J
Cobalt
7440-48-4
T
1
IMAC
Ng/L
6.5
1 U
0.50 U
0.5 U
0.25 J
0.3 J
Copper
7440-50-8
D
/L
7.6 J+
1 U
1.0 U
1 U
0.27 J+
1.4
Copper
7440-50-8
T
1000
02L
/L
1.8
8.46
1.2
0.27 J
0.88 J+
0.87 J
Iron
7439-89-6
D
/L
44 J
57
1100
1100 J
50 U
69
Iron
7439-89-6
T
300
02L
Ng/L
370
138
1000
1200 J
110
48 J
Lead
7439-92-1
D
/L
0.8 J+
1 U
0.10 U
0.1 U
0.1 U
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.25
1 U
0.10 U
0.1 U
0.057 J+
0.24
Magnesium
7439-95-4
T
/L
896
18900
18900
19400
13600
13000
Manganese
7439-96-5
D
/L
140
31
30
27
300
110
Manganese
7439-96-5
T
50
02L
Ng/L
160
32
29
30
280
25
Mercury
7439-97-6
D
/L
0.2 U
0.05 U
0.20 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.05 U
0.20 UJ
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
/L
1.9 J+
10 UJ
55.7
45.5
1.8 J+
55.5
Molybdenum
7439-98-7
D
/L
0.5 U
2.51
1.6
1.1
0.57
0.48 J
Molybdenum
7439-98-7
T
/L
0.5 U
2.52
1.6
1.1
0.41 J
0.12 J
Nickel
7440-02-0
D
/L
3.7
1 U
0.50 U
0.25 J
0.47 J
1.5
Nickel
7440-02-0
T
100
02L
/L
3.9
1 U
0.50 U
0.47 J
0.49 J+
1
Potassium
7440-09-7
T
/L
5000 U
654
5000 U
5000 U
5000 U
5000 U
Selenium
7782-49-2
D
/L
0.5 U
1 U
0.50 U
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.5 U
1 U
0.50 U
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
/L
6460
13200
15200
14000
7300
6400
Strontium
7440-24-6
D
/L
13
1930
2100
1700
890
480
Strontium
7440-24-6
T
/L
15
1940
1900
1900
740
110
Thallium
7440-28-0
D
/L
0.1 U
0.2 U
0.10 U
0.1 U
0.1 U
0.023 J
Thallium
7440-28-0
T
0.2
IMAC
Ng/L
0.1 U
0.55
0.10 U
0.1 U
0.1 U
0.1 U
Vanadium
7440-62-2
D
/L
1 U
1.15
1.0 U
1 U
1 U
1 U
Vanadium
7440-62-2
T
0.3
IMAC
Ng/L
0.74 J
1.38
1.0 U
0.31 J
1 U
1.2
Zinc
7440-66-6
D
/L
10
14
10 U
19
31
4.7 J
Zinc
7440-66-6
T
1000
02L
/L
16
7
10 U
16 J+
27
2.6 J
Total Dissolved Solids
TDS
N
500000
02L
/L
36000
270000
266000
276000
252000
279000
Total Organic Carbon
TOC
N
/L
1000 U
148
1000 U
29000 J
520 J
1000 U
Total Suspended Solids
TSS
N
/L
5900
5000 U
2500 U
2600 U
2500 U
3500
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
10000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
7800
220000
203000
233000
205000
168000
Alkalinity, lab
ALK-LAB
N
/L
7800
220000
203000 J-
233000 J
205000
168000
Chloride
16887-00-6
N
250000
02L
/L
4200
3300
3800
4100
8000 J+
5200
Nitrite as N
14797-65-0
N
1000
02L
/L
10 U
Nitro en, NO2 plus NO3
NO2-NO3
N
/L
42 J+
20 U
20 U
20 UJ
36
Sulfate
14808-79-8
N
250000
02L
/L
7000
12000
8400
11000
29800
27700
Sulfide
18496-25-8
N
/L
100 U
100 U
180
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
0.58
0.5 U
Iron
7439-89-6
T
300
02L
Ng/L
516
100
Manganese
7439-96-5
D
/L
31.4
193
Manganese
7439-96-5
T
50
02L
Ng/L
32.2 J+
-
272 J+
As III
7784-46-5
T
/L
0.456 J
0.2 U
0.5 U
As V
10103-60-3
T
/L
0.5 U
0.203
0.5 U
Chromium VI
18540-29-9
T
0.07
DHHS
Ng/L
0.027 J
0.014 J
0.089 J
1.1
Fe II
1345-25-1
T
/L
476 J
20 U
46.6 J-
Fe III
1309-37-1
T
/L
20 U
Mn II
1344-43-0
1 T
/L
1
53.4 J
Page 7 of 8

Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-9S
MW-23BR
MW-23BR
MW-23BR
MW-23D
MW-23D
Round 4
Round 1
Round 2
Round 4
Round 1
Round 4
12/15/2015
6/1/2015
9/10/2015
12/15/2015
6/30/2015
12/15/2015
N
N
N
N
N
N
DR-GWA-9S-NS-4Q15-2
MW-23BR
DR-MW-23BR-NS-3Q15
R-MW-23BR-NS-4Q15-:
MW-23D
DR-MW-23D-NS-4Q15-2
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Mn IV
1313-13-9
T
/L
311 J
Se IV
10102-18-8
T
/L
2 UJ
0.5 U
2 U
Se VI
13410-01-0
T
/L
2 UJ
0.5 UJ
2 U
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
1.6
3.05
0.16
0.41
1.44
1.86
Temperature
TEMP
N
Deg C
19.5
21.8
21.9
12.1
19.8
14.8
pH
PH
N
6.5
8.5
02L
SU
5.3
7.45
7.5
7.5
6.89
5.95
Turbidity, field
TURB
N
NTU
8.2
0.22
6.1
1.2
51.69
9.73
Specific Conductivity field
SC
NPS/cm
54.9
474.3
716
451.8
438.2
385.3
Oxidation Reduction Potential
ORP
N
mV
211.3
6
-146.7
-141.6
146.5
68.8
GW Depth TOC
GW DE TH-TOCI
N
ft
28.19
15.48
Notes:
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 Ja
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 8

Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-12D
GWA-12D
GWA-12S
GWA-12S
GWA-6S
GWA-7D
GWA-7D
Round 1 (CSA Sampling)
Round 2 (30-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
6/4/2015
9/9/2015
6/4/2015
9/11/2015
9/12/2015
6/16/2015
9/10/2015
N
N
N
N
N
N
N
GWA-12D
DR-GWA-12D-NS-3Q15
GWA-12S
DR-GWA-12S-NS-3Q15
DR-GWA-6S-NS-3Q15
GWA-7D
DR-GWA-7D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Aluminum
D
7429-90-5
NS
pg/L
1 298
100 U
21
100 U
100 U
9.1 J
100 U
Aluminum
T
7429-90-5
NS
pg/L
5 U
81 J
190
350
220
117
130
Antimony
D
7440-36-0
NS
pg/L
1 U
0.16 J
1 U
0.5 U
0.5 U
0.5 U
0.2 J
Antimony
T
7440-36-0
1
IMAC
pg/L
1 U
0.19 J
1 U
0.5 U
0.5 U
0.5 U
0.2 J
Arsenic
D
7440-38-2
NS
pg/L
2.54
2.3
1 U
0.14 J
3.1
0.5 U
0.5 U
Arsenic
T
7440-38-2
10
02L
pg/L
3.71
2.7
1 U
0.16 J
2.9
0.13 J
0.5 U
Barium
D
7440-39-3
NS
pg/L
23
16
53
46
210
23
19
Barium
T
7440-39-3
700
02L
pg/L
17
16
55
54
220
24
19
Beryllium
D
7440-41-7
NS
pg/L
1 U
0.2 U
1 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
1 U
0.2 U
1 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
D
7440-42-8
NS
pg/L
50 U
50 U
50 U
50 U
710
50 U
50 U
Boron
T
7440-42-8
700
02L
pg/L
50 U
50 U
50 U
50 U
700
50 UJ
50 U
Cadmium
D
7440-43-9
NS
pg/L
1 U
0.08 U
1 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
1 U
0.08 U
1 U
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pg/L
51700
54700
12200
10100
83000
26900
22800
Chromium
D
7440-47-3
NS
pg/L
1 U
0.23 J
1 U
0.48 J
0.45 J
0.25 J+
1.3
Chromium
T
7440-47-3
10
02L
pg/L
2.87
0.43 J+
1.01
1.4
0.75 J+
0.51 J+
0.54 J+
Cobalt
D
7440-48-4
NS
pg/L
1 U
0.31 J
1 U
0.24 J
1.6
2.8
2.7
Cobalt
T
7440-48-4
1
IMAC
pg/L
1 U
0.35 J
1 U
0.49 J
1.8
2.8
2.8
Copper
D
1 7440-50-8
NS
pg/L
3.32
1 U
1 UJ
0.57 J
0.29 J
0.22 J+
1 U
Copper
T
7440-50-8
1000
02L
pg/L
3.9 J+
0.52 J
1 U
1.3
0.39 J
0.39 J+
0.25 J+
Iron
D
7439-89-6
NS
pg/L
386
30 J
10 U
50 U
13600
1390
1700
Iron
T
7439-89-6
300
02L
pg/L
54
100
185
460
15200
1610
1800
Lead
D
7439-92-1
NS
pg/L
1 U
0.16
1 U
0.1 U
0.1 U
0.1 UJ
0.063 J
Lead
T
7439-92-1
15
02L
pg/L
1.74
0.081 J
1 U
0.24
0.077 J
0.13 J+
0.11
Magnesium
T
7439-95-4
NS
pg/L
16400
18000
5960
6070
12500
13300
12900
Manganese
D
7439-96-5
NS
pg/L
60
37
102
31
3700
1100
960
Manganese
T
7439-96-5
50
02L
pg/L
49
40 J+
150
45
3800
1000
910
Mercury
D
7439-97-6
NS
pg/L
0.05 U
0.2 U
0.05 U
0.2 U
0.2 U
0.2 UJ
0.2 U
Mercury
T
7439-97-6
1
02L
pg/L
0.05 U
0.2 U
0.05 U
0.2 U
0.2 U
0.2 UJ
0.2 UJ
Methane
N
74-82-8
NS
pg/L
10 U
1.8 J+
10 U
1.8 J+
2740
10 U
1.8 J
Molybdenum
D
7439-98-7
NS
pg/L
1.26
0.82
1 U
0.5 U
8.6
0.14 J
0.5 U
Molybdenum
T
7439-98-7
NS
pg/L
1.52
0.8
1 U
0.11 J
8
0.11 J
0.5 U
Nickel
D
7440-02-0
NS
pg/L
1 U
3
2.14
2.9
1.8
1.4 J+
1.7
Nickel
T
7440-02-0
100
02L
pg/L
3.37
3.4
3.09
3A
1.9
2.1 J+
1.3 J+
Potassium
T
7440-09-7
NS
pg/L
1000
5000 U
1690
5000 U
10700
5000 U
5000 U
Selenium
D
7782-49-2
NS
pg/L
1 U
0.5 U
1 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
1 U
0.5 U
1 U
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pg/L
9470
9730
7920
7010
26200
25900
22900
Strontium
D
7440-24-6
NS
pg/L
533
520
140
140
680
290
290
Strontium
T
7440-24-6
NS
pg/L
526
520
140
140
710
290
280
Thallium
D
7440-28-0
NS
pg/L
0.2 U
0.1 U
0.2 U
0.1 U
0.1 U
0.1 UJ
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.2 U
0.1 U
0.2 U
0.1 U
0.1 UJ
0.1 UJ
0.1 U
Vanadium
D
7440-62-2
NS
pg/L
2.75
3
0.3 U
0.7 J
1.2
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
5.65
3.7
0.3 U
0.93 J
1.1
0.3 J
1 U
Zinc
D
7440-66-6
NS
pg/L
14
2.9 J
6
5.1 J
13
2.6 J
12
Zinc
T
7440-66-6
1000
02L
pg/L
5 UJ
12
5 UJ
5.9 J
4.8 J
3.5 J
10 J+
Total Dissolved Solid
N
TDS
500000
02L
pg/L
250000
257000
110000
105000
340000
242000
233000
Total Organic Carbot
N
TOC
NS
pg/L
202 J+
1000 U
697 J+
710 J
7800
590 J
1000 U
Total Suspended Sol
N
TSS
NS
pg/L
16000
7200
5000 U
3000
371000
4300
5000 U
Alkalinity, CO3
N
ALK-CO3
NS
pg/L
10000 U
5000 U
10000 U
5000 U
5000 UJ
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
190000
196000
28000
11900
317000
59000
53900
Alkalinity, lab
N
ALK-LAB
NS
pg/L
190000
196000
28000
11900
317000
59000
53900
Chloride
N
16887-00-6
250000
02L
pg/L
3900
3300
3000
1700
18900
3000
3000
Nitrite as N
N
14797-65-0
1000
02L
pg/L
178
808
Nitrogen, NO2 plus
N
NO2-NO3
NS
pg/L
170
580
16 J-
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
16000
15300
41000
46100
2300
98200
98600
Sulfide
N
18496-25-8
NS
pg/L
500 U
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pg/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pg/L
Fe(III)
T
1309-37-1
NS
pg/L
Mn(II)
T
1344-43-0
NS
pg/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
1 NS
I
pg/L
Se(VI)
T
13410-01-0
NS
pg/L
Uranium, Natural
T
7440-61-1
NS
pg/L
Page 1 of 8

Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-12D
GWA-12D
GWA-12S
GWA-12S
GWA-6S
GWA-7D
GWA-7D
Round 1 (CSA Sampling)
Round 2 (30-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
6/4/2015
9/9/2015
6/4/2015
9/11/2015
9/12/2015
6/16/2015
9/10/2015
N
N
N
N
N
N
N
GWA-12D
DR-GWA-12D-NS-3Q15
GWA-12S
DR-GWA-12S-NS-3Q15
DR-GWA-6S-NS-3Q15
GWA-7D
DR-GWA-7D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
pg/L
Uranium-234
T
13966-29-5
NS
pg/L
Uranium-236
T
13982-70-2
NS
pg/L
Dissolved Oxygen
N
I DO
NS
mg/L
0.47
0.44
4.85
5.34
0.2
2.21
0.2
Temp (Celcius)
N
TEMP
--
NS
Deg C
17.7
20.7
18.3
23.4
21.1
29.8
22.9
pH (field)
N
PH
6.5
8.5
02L
SU
1 7.47
7.4
5.45
5.6
6.8
6.01
6.2
Turbidity, field
N
TURB
--
NS
NTU
8.35
4.9
2.38
87.1
140.2
8.58
9.3
Spec. Cond. (field)
N
SC
NS
PS/cm
396.7
526
151.3
257.4
687
353.2
252.1
Oxidation Reduction
N
ORP
NS
my
-81.4
-19.7
321
242.7
-92.1
129
-74.6
GW Depth (TOC)
N
GW_DEPTH-TOCj
NS
ft
33.28
16.76
19.7
20.5
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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 8

Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-7S
GWA-7S
GWA-8D
GWA-8D
GWA-8S
GWA-9D
GWA-9D
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (30-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
6/19/2015
9/10/2015
6/5/2015
9/9/2015
6/18/2015
6/15/2015
9/9/2015
N
N
N
N
N
N
N
GWA-7S
DR-GWA-7S-NS-3Q15
GWA-8D
DR-GWA-8D-NS-3Q15
GWA-8S_N_WG_20150618
GWA-9D
DR-GWA-9D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Aluminum
D
7429-90-5
NS
pg/L
1 420
730
6.4 J
100 U
100 U
10 U
100 U
Aluminum
T
7429-90-5
NS
pg/L
600
850
769
300
150
1270
100 U
Antimony
D
7440-36-0
NS
pg/L
0.5 U
0.63
0.6
0.5 U
0.22 J
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
0.23 J
0.6
0.71
0.5 U
0.16 J
0.5 U
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
0.5 U
0.5 U
1.2
0.98
0.6
2.1
0.69
Arsenic
T
7440-38-2
10
02L
pg/L
0.5 U
0.5 U
1.4
0.86
0.57
2.3
0.67
Barium
D
7440-39-3
NS
pg/L
25
32
29
32
19
24
20
Barium
T
7440-39-3
700
02L
pg/L
28
33
34
34
19
23
21
Beryllium
D
7440-41-7
NS
pg/L
4.7
6.7
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
3.7
7.7
0.2 U
0.2 U
0.2 U
0.085 J
0.2 U
Boron
D
7440-42-8
NS
pg/L
38 J+
50 U
50 U
50 U
39 J+
50 U
50 U
Boron
T
7440-42-8
700
02L
pg/L
50 U
50 U
50 U
50 U
34 J
50 U
50 U
Cadmium
D
7440-43-9
NS
pg/L
0.46
0.42
0.08 U
0.08 U
0.081
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
0.37
0.43
0.027 J
0.08 UJ
0.08 U
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pg/L
25800
23500
130000
124000
39600
17700
14200
Chromium
D
7440-47-3
NS
pg/L
0.95 J+
0.87
0.9 J+
1.1
0.46 J
0.25 J
0.34 J
Chromium
T
7440-47-3
10
02L
pg/L
1.9
2 J+
3.2
3.4 J+
0.95
2.9
1.2 J+
Cobalt
D
7440-48-4
NS
pg/L
19.2
13.4
0.14 J
0.5 U
8.6
0.51
0.36 J
Cobalt
T
7440-48-4
1
IMAC
I pg/L
17.7
14.6
0.26 J
0.19 J
9.7
1.2
0.38 J
Copper
D
1 7440-50-8
NS
pg/L
1 UJ
2.4
5 J+
0.32 J
0.37 J
1 U
1.9
Copper
T
7440-50-8
1000
02L
pg/L
1.2 J+
2.4 J+
1.7 J+
0.88 J+
0.42 J
2.1 J+
1 U
Iron
D
7439-89-6
NS
pg/L
50 U
50 U
50 U
140
50 U
1390
1800
Iron
T
7439-89-6
300
02L
pg/L
310
61
413
420
190
3290
2000
Lead
D
7439-92-1
NS
pg/L
0.1 U
0.056 J
0.46
0.1 U
0.1 U
0.1 U
0.13
Lead
T
7439-92-1
15
02L
pg/L
0.18 J+
0.095 J
0.81
0.37 J+
0.068 J
0.67 J+
0.1 U
Magnesium
T
7439-95-4
NS
pg/L
18600
18000
29200
34200
24800
3050
2620
Manganese
D
7439-96-5
NS
pg/L
1000
1100
1000
1600
2700
590
690
Manganese
T
7439-96-5
50
02L
pg/L
950
1200
1200
1700
1700
640
720
Mercury
D
7439-97-6
NS
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pg/L
0.085 J+
0.2 UJ
0.2 U
0.2 U
0.2 U
0.072 J
0.2 U
Methane
N
74-82-8
NS
pg/L
1.9 J+
2.4 J
28
8.8 J+
6.6 J+
10 U
3 J+
Molybdenum
D
7439-98-7
NS
pg/L
0.5 U
0.2 J
3.1
2.4
0.73
0.27 J
0.12 J
Molybdenum
T
7439-98-7
NS
pg/L
0.14 J
0.16 J
3.4
2.3
0.73
0.52
0.12 J
Nickel
D
7440-02-0
NS
pg/L
51.1
39.6
0.51 J+
0.81
6.1
1.2 J+
0.98
Nickel
T
7440-02-0
100
02L
pg/L
46.9
42
1.4 J+
1.8 J+
5.8
3.2 J+
1.2
Potassium
T
7440-09-7
NS
pg/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
7782-49-2
NS
pg/L
0.62
0.84
0.69
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.86
0.88
1.1
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pg/L
18700
21400
29900
32900
40400
6140
5510
Strontium
D
7440-24-6
NS
pg/L
780
710
630
730
460
63
52
Strontium
T
7440-24-6
NS
pg/L
800
740
700
760
420
64
55
Thallium
D
7440-28-0
NS
pg/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 U
0.1 U
0.018 J
0.1 U
0.1 U
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pg/L
1 U
0.4 J
3.2
0.41 J
1 UJ
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
0.38 J
1 U
5.2
1.3
0.45 J
1.8
1 U
Zinc
D
7440-66-6
NS
pg/L
560
490
10 U
10 U
7.8 J
3.9 J+
10 U
Zinc
T
7440-66-6
1000
02L
pg/L
390
500
3.4 J+
10 UJ
13
8.9 J+
10 U
Total Dissolved Solid
N
TDS
500000
02L
pg/L
318000
287000
690000 J-
726000
397000
113000
91000
Total Organic Carbot
N
TOC
NS
pg/L
980 J
750 J
1100
970 J
1200
1000 U
17500
Total Suspended Sol
N
TSS
NS
pg/L
38000
3000
13000 J+
6700
18900
16100
5000 U
Alkalinity, CO3
N
ALK-CO3
NS
pg/L
5000 U
5000 U
10000 U
5000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
5500
2100 J
120000
129000
61800
57000
47600
Alkalinity, lab
N
ALK-LAB
NS
pg/L
5500
2100 J
120000
129000
61800
57000
47600
Chloride
N
16887-00-6
250000
02L
pg/L
2400
3000
4700
4000
5500
2000
2100
Nitrite as N
N
14797-65-0
1000
02L
pg/L
Nitrogen, NO2 plus
N
NO2-NO3
NS
pg/L
1 370
1100
20 U
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
176000
170000
368000
346000
181000
4200
4300
Sulfide
N
18496-25-8
NS
pg/L
100 U
100 U
500 U
100 U
100 U
500 U
100 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pg/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
I pg/L
Fe(III)
T
1309-37-1
NS
pg/L
Mn(II)
T
1344-43-0
NS
pg/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
1 NS
pg/L
Se(VI)
T
13410-01-0
NS
pg/L
Uranium, Natural
T
7440-61-1
NS
pg/L
Page 3 of 8

Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-7S
GWA-7S
GWA-8D
GWA-8D
GWA-8S
GWA-9D
GWA-9D
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (30-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
6/19/2015
9/10/2015
6/5/2015
9/9/2015
6/18/2015
6/15/2015
9/9/2015
N
N
N
N
N
N
N
GWA-7S
DR-GWA-7S-NS-3Q15
GWA-8D
DR-GWA-8D-NS-3Q15
GWA-8S_N_WG_20150618
GWA-9D
DR-GWA-9D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
pg/L
Uranium-234
T
13966-29-5
NS
pg/L
Uranium-236
T
13982-70-2
NS
pg/L
Dissolved Oxygen
N
I DO
NS
mg/L
4.89
2.1
3.46
0.95
0.16
0.12
Temp (Celcius)
N
TEMP
--
NS
Deg C
25
30.1
23.6
19
26.1
16.7
pH (field)
N
PH
6.5
8.5
02L
SU
1 5.39
4.9
7.81
7.35
6.4
6.2
Turbidity, field
N
TURB
--
NS
NTU
9
6.6
9.74
17.1
16.28
0.9
Spec. Cond. (field)
N
SC
NS
PS/cm
394.9
419.6
839
950
141.9
157.4
Oxidation Reduction
N
ORP
NS
my
342.9
24.9
78.9
-75
90.8
69.8
GW Depth (TOC)
N
GW DEPTH-TOC4
I NS
I
ft
19.21
34.68
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-9S
GWA-9S
MW-12
MW-12
MW-12D
MW-12D
MW-20D
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
6/19/2015
9/9/2015
6/20/2015
9/9/2015
6/20/2015
9/9/2015
6/24/2015
N
N
N
N
N
N
N
GWA-9S
DR-GWA-9S-NS-3Q15
MW-12
DR-MW-12-NS-3015
MW-12D
DR-MW-I2D-NS-3Q15
MW-20D
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Aluminum
D
7429-90-5
NS
pg/L
1 100 U
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pg/L
4300
630
990
180
960
59 J
130
Antimony
D
7440-36-0
NS
pg/L
0.19 J
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
0.22 J
0.5 U
0.18 J
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
0.5 U
0.5 U
0.42 J
0.38 J
0.44 J
0.35 J
0.58
Arsenic
T
7440-38-2
10
02L
pg/L
0.63
0.5 U
0.71
0.28 J
0.44 J
0.24 J
0.91
Barium
D
7440-39-3
NS
pg/L
5 U
10
5.8
5.9
20
19
56
Barium
T
7440-39-3
700
02L
pg/L
42
17
10
6.7
29
21
66
Beryllium
D
7440-41-7
NS
pg/L
0.077 J
0.21
0.11 J
0.11 J
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.67
0.23
0.22
0.14 J
0.11 J
0.2 U
0.2 U
Boron
D
7440-42-8
NS
pg/L
50 U
50 U
33 J+
50 U
50 U
50 U
26 J
Boron
T
7440-42-8
700
02L
pg/L
50 U
50 U
50 U
50 U
50 U
50 U
35 J
Cadmium
D
7440-43-9
NS
pg/L
0.08 U
0.038 J
0.074 J
0.08 U
0.052 J
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
0.036 J
0.034 J
0.05 J
0.052 J
0.08 U
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pg/L
1050
584
2440
3200
12800
12700
43400
Chromium
D
7440-47-3
NS
pg/L
0.27 J+
0.57
0.41 J+
0.18 J
0.2 J+
0.48 J
0.5 UJ
Chromium
T
7440-47-3
10
02L
pg/L
3.5
0.97 J+
2.6 J+
0.59 J+
1.4 J+
0.52 J+
0.47 J
Cobalt
D
7440-48-4
NS
pg/L
1.5
4.5
9.9
9.3
4.5
4.3
0.5 U
Cobalt
T
7440-48-4
1
IMAC
I pg/L
9.3
4.7
10.1
8.9
4.8
4.6
0.5 U
Copper
D
1 7440-50-8
NS
pg/L
1 UJ
5
3.1 J+
2.9
0.25 J+
0.53 J
1 U
Copper
T
7440-50-8
1000
02L
pg/L
4.5 J+
1.4
10.6
3.2
1.7 J+
0.38 J
1 U
Iron
D
7439-89-6
NS
pg/L
50 U
50 U
1900
2400
4800
4500
50 U
Iron
T
7439-89-6
300
02L
pg/L
5100
750
3600
2900
6100
4900
200
Lead
D
7439-92-1
NS
pg/L
0.1 U
0.51
0.11 J+
0.19
0.1 U
0.1 U
0.1 U
Lead
T
7439-92-1
15
02L
pg/L
4.3
0.38
4.5
1.4
0.51
0.087 J
0.094 J
Magnesium
T
7439-95-4
NS
I pg/L
890
558
4680
5090
8110
7860
11000
Manganese
D
7439-96-5
NS
pg/L
36
100
440
450
1300
1300
470
Manganese
T
7439-96-5
50
02L
pg/L
220
110
450
470
1400
1400
500
Mercury
D
7439-97-6
NS
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pg/L
0.073 J+
0.2 U
0.072 J+
0.2 U
0.2 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
pg/L
2.3 J+
2.7 J+
3.4 J+
4.9 J+
2.3 J+
2.9 J+
12.8
Molybdenum
D
7439-98-7
NS
pg/L
0.5 U
0.5 U
0.15 J
0.1 J
0.16 J
0.11 J
0.22 J
Molybdenum
T
7439-98-7
NS
I pg/L
0.3 J
0.5 U
0.2 J
0.15 J
0.2 J
0.15 J
0.22 J
Nickel
D
7440-02-0
NS
pg/L
0.66 J+
2.9
9.7
9.4
5
4.8
0.5 U
Nickel
T
7440-02-0
100
02L
pg/L
6.1 J+
2.9
11.2
9.8
5.7
5.2
0.19 J
Potassium
T
7440-09-7
NS
pg/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
7782-49-2
NS
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.56
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pg/L
6980
5390
4970 J
5490
13100
11200
10600
Strontium
D
7440-24-6
NS
pg/L
3.1 J
8.1
9.2
11
46
51
460
Strontium
T
7440-24-6
NS
pg/L
21
9.1
10
12
51
53
520
Thallium
D
7440-28-0
NS
pg/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.034 J
0.1 U
0.017 J
0,019 J
0.1 U
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pg/L
1 U
1 U
1 U
1 U
1 U
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
5.1
0.59 J
2.6
1 U
1.4
1 U
0.41 J
Zinc
D
7440-66-6
NS
pg/L
5.1 J+
12
90
84
12 J+
17
10 UJ
Zinc
T
7440-66-6
1000
02L
pg/L
20
16
92
86
16
18
10 UJ
Total Dissolved Solid
N
TDS
500000
02L
pg/L
161000
50000
72000
69000
168000
145000
187000
Total Organic Carbot
N
TOC
NS
pg/L
14200
1000 U
1000 U
1000 U
1000 U
1000 U
1000 U
Total Suspended Sol
N
TSS
NS
pg/L
239000
30200
76300
24200
120000
6900
5500
Alkalinity, CO3
N
ALK-CO3
NS
pg/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
9100
5700
17200
22100
62500
54700
158000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
9100
5700
17200
22100
62500
54700
158000
Chloride
N
16887-00-6
250000
1 02L
pg/L
4200
4000
5900
6000
9400
8900
4200
Nitrite as N
N
14797-65-0
1000
02L
pg/L
Nitrogen, NO2 plus
N
NO2-NO3
NS
pg/L
48
36
20 U
20 U
20 UJ
20 U
12 J
Sulfate
N
14808-79-8
250000
02L
pg/L
650 J
2700
10200
9900
25400
23200
5700
Sulfide
N
18496-25-8
NS
pg/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pg/L
Chromium (VI)
T
18540-29-9
0.07
1 DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pg/L
Fe(III)
T
1309-37-1
NS
pg/L
Mn(II)
T
1344-43-0
NS
pg/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
NS
pg/L
Se(VI)
T
13410-01-0
1 NS
pg/L
Uranium, Natural
T
7440-61-1
1 NS
pg/L
Page 5 of 8

Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-9S
GWA-9S
MW-12
MW-12
MW-12D
MW-12D
MW-20D
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
6/19/2015
9/9/2015
6/20/2015
9/9/2015
6/20/2015
9/9/2015
6/24/2015
N
N
N
N
N
N
N
GWA-9S
DR-GWA-9S-NS-3Q15
MW-12
DR-MW-12-NS-3015
MW-12D
DR-MW-I2D-NS-3Q15
MW-20D
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
pg/L
Uranium-234
T
13966-29-5
NS
pg/L
Uranium-236
T
13982-70-2
NS
pg/L
Dissolved Oxygen
N
I DO
NS
mg/L
4.17
4.52
0.25
0.2
0.25
0.2
0.49
Temp (Celcius)
N
TEMP
--
NS
Deg C
23.8
19
19.4
18.5
23.7
19.9
16.8
pH (field)
N
PH
6.5
8.5
02L
SU
1 5.55
5.1
5.58
5.6
6.18
6.1
7.44
Turbidity, field
N
TURB
--
NS
NTU
235.9
7.2
51.04
8.2
29.71
4.89
9.67
Spec. Cond. (field)
N
SC
NS
PS/cm
39.3
48.1
58.3
101.7
210.5
214.5
322
Oxidation Reduction
N
ORP
NS
my
331.5
287
166.3
-48.2
64.5
-54.4
22
GW Depth (TOC)
N
GW_DEPTH-TOC4
I NS
I
ft
32.68
23.35
22.64
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-20S
OW-310D
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
6/24/2015
9/11/2015
N
N
MW-20S
DR-OW-310D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Aluminum
D
7429-90-5
NS
pg/L
100 U
100 U
Aluminum
T
7429-90-5
NS
pg/L
100 U
800
Antimony
D
7440-36-0
NS
pg/L
0.5 U
0.28 J
Antimony
T
7440-36-0
1
IMAC
pg/L
0.5 U
0.25 J
Arsenic
D
7440-38-2
NS
pg/L
0.58
777
Arsenic
T
7440-38-2
10
02L
pg/L
0.63
782
Barium
D
7440-39-3
NS
pg/L
12
380
Barium
T
7440-39-3
700
02L
pg/L
13
410
Beryllium
D
7440-41-7
NS
pg/L
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.2 U
0.12 J
Boron
D
7440-42-8
NS
pg/L
50 U
980
Boron
T
7440-42-8
700
02L
pg/L
50 U
980
Cadmium
D
7440-43-9
NS
pg/L
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pg/L
15300
95200
Chromium
D
7440-47-3
NS
pg/L
0.24 J+
0.21 J
Chromium
T
7440-47-3
10
02L
pg/L
0.22 J
0.95 J+
Cobalt
D
7440-48-4
NS
pg/L
2.2
1.4
Cobalt
T
7440-48-4
1
IMAC
pg/L
2.1
1.9
Copper
D
1 7440-50-8
NS
pg/L
1 U
1 U
Copper
T
7440-50-8
1000
02L
pg/L
1 U
1.7 J+
Iron
D
7439-89-6
NS
pg/L
2500
2200
Iron
T
7439-89-6
300
02L
pg/L
2800
3500
Lead
D
7439-92-1
NS
pg/L
0.1 U
0.1 U
Lead
T
7439-92-1
15
02L
pg/L
0.1 U
0.71
Magnesium
T
7439-95-4
NS
pg/L
10500
13500
Manganese
D
7439-96-5
NS
pg/L
840
1400
Manganese
T
7439-96-5
50
02L
pg/L
820
1600
Mercury
D
7439-97-6
NS
pg/L
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pg/L
0.2 U
0.2 U
Methane
N
74-82-8
NS
pg/L
79.2
816
Molybdenum
D
7439-98-7
NS
pg/L
0.22 J
45.9
Molybdenum
T
7439-98-7
NS
I pg/L
0.18 J
43
Nickel
D
7440-02-0
NS
pg/L
0.92
2.2
Nickel
T
7440-02-0
100
02L
pg/L
0.87
2.6 J+
Potassium
T
7440-09-7
NS
pg/L
5000 U
7810
Selenium
D
7782-49-2
NS
pg/L
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pg/L
9640
20000
Strontium
D
7440-24-6
NS
pg/L
120
2600
Strontium
T
7440-24-6
NS
pg/L
130
2600
Thallium
D
7440-28-0
NS
pg/L
0.1 U
0.091 J
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 U
0.14 J+
Vanadium
D
7440-62-2
NS
pg/L
1 U
1.6
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
1 U
3.2
Zinc
D
7440-66-6
NS
pg/L
2.8 J+
12
Zinc
T
7440-66-6
1000
02L
pg/L
60
3.4 J
Total Dissolved Solid
N
TDS
500000
02L
pg/L
121000
383000
Total Organic Carbot
N
TOC
NS
pg/L
690 J
1000 U
Total Suspended Sol
N
I TSS
NS
pg/L
3000
6600
Alkalinity, CO3
N
ALK-CO3
NS
pg/L
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
68300
283000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
68300
283000
Chloride
N
16887-00-6
250000
02L
pg/L
20800
19100
Nitrite as N
N
14797-65-0
1000
02L
pg/L
Nitrogen, NO2 plus
N
NO2-NO3
NS
pg/L
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
3800
26400
Sulfide
N
18496-25-8
NS
pg/L
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pg/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pg/L
Fe(III)
T
1309-37-1
NS
pg/L
Mn(II)
T
1344-43-0
NS
pg/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
NS
pg/L
Se(VI)
T
13410-01-0
NS
pg/L
Uranium, Natural
T
7440-61-1
NS
pg/L
Page 7 of 8

Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-20S
OW-310D
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
6/24/2015
9/11/2015
N
N
MW-20S
DR-0W-310D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
pg/L
Uranium-234
T
13966-29-5
NS
pg/L
Uranium-236
T
13982-70-2
NS
pg/L
Dissolved Oxygen
N
I DO
NS
mg/L
0.81
Temp (Celcius)
N
TEMP
--
NS
Deg C
23.6
pH (field)
N
PH
6.5
8.5
02L
Su
7.1
Turbidity, field
N
TURB
--
NS
NTU
5.82
Spec. Cond. (field)
N
SC
NS
PS/cm
483.9
Oxidation Reduction
N
ORP
NS
my
-133.3
GW Depth (TOC)
N
GW DEPTH-TOC4
I NS
I
ft
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 8

Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-10D
AB-10D
AB-25BR
AB-25BR
AB-25D
AB-25D
AB-30BR
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
6/24/2015
9/11/2015
6/26/2015
9/11/2015
6/26/2015
9/12/2015
6/24/2015
N
N
N
N
N
N
N
AB-10D
DR-AB-10D-NS-3Q15
AB-25BR
DR-AB-25BR-NS-3Q15
AB-25D
DR-AB-25D-NS-3Q15
AB-30BR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
74 J
100 U
100 U
100 U
52 J
100 U
100 U
Aluminum
T
7429-90-5
NS
pq/L
290
430
100 U
85 J
170
360
280
Antimony
D
7440-36-0
NS
pq/L
8.8
1.5
1
0.86
1.6
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
1.9
1.4
1
0.45 J
1.7
0.2 J
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
0.66
0.41 J
2.4
1.6
0.31 J
0.25 J
0.82
Arsenic
T
7440-38-2
10
02L
pg/L
0.68
0.51 J+
2.6
1
0.45 J
0.38 J
0.83
Barium
D
7440-39-3
NS
pq/L
37
310
19
30
16
26
82
Barium
T
7440-39-3
700
02L
pq/L
290
400
21
35
20
29
99
Beryllium
D
7440-41-7
NS
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
D
7440-42-8
NS
pq/L
250
240
190
270
820
930
300
Boron
T
7440-42-8
700
02L
pg/L
290
230
180
260
840
830
320
Cadmium
D
7440-43-9
NS
pq/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
0.08 U
0.08 U
0.08 U
0.08 U
0.026 J
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pg/L
60800 J-
88700
33200
40500
29300
35600 J-
69700
Chromium
D
7440-47-3
NS
pq/L
5.5
3.4
4.4
0.49 J
0.19 J+
0.33 J+
0.86 J+
Chromium
T
7440-47-3
10
02L
pg/L
4.1
6.1
30.1
13.4
0.96
2.9 J+
2.2 J+
Cobalt
D
7440-48-4
NS
pq/L
0.96
1.1
0.5 U
0.5 U
0.25 J
0.34 J+
0.5 U
Cobalt
T
7440-48-4
1
IMAC
pg/L
1.1
1.9
0.27 J
0.24 J
0.3 J
0.78
0.29 J
Copper
D
7440-50-8
NS
pq/L
1.5 J+
5.3
0.41 J+
0.48 J
0.28 J+
1.3 J+
1.2 J+
Copper
T
7440-50-8
1000
02L
pq/L
2.1 J+
1.9
1.6
2.5 J+
0.36 J
0.77 J+
2.5 J+
Iron
D
7439-89-6
NS
pq/L
50 U
50 UJ
50 U
50 U
50 U
50 U
77
Iron
T
7439-89-6
300
02L
pg/L
34 J
43 J
150
150
93
330
490
Lead
D
7439-92-1
NS
pq/L
0.1 UJ
1
0.1 UJ
0.074 J
0.1 UJ
0.13 J+
0.14 J+
Lead
T
7439-92-1
15
02L
pq/L
0.13
1.2
0.086 J
0.49
0.17
0.52 J+
0.28
Magnesium
T
7439-95-4
NS
pq/L
10900
3060
6090
8390
10500
13400
10900
Manganese
D
7439-96-5
NS
pq/L
5 U
5 U
4.1 J
52
190
510
350
Manganese
T
7439-96-5
50
02L
pg/L
26
13
7.8
59
180
550
370
Mercury
D
7439-97-6
NS
pq/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 UJ
0.2 U
Mercury
T
7439-97-6
1
02L
pq/L
0.2 U
0.2 UJ
0.2 U
0.2 UJ
0.2 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
pg/L
31.5 J+
38.6 J
8.6 J+
6.6 J+
4.2 J+
3.5 J+
34.5 J+
Molybdenum
D
7439-98-7
NS
pq/L
2.4
2.1
7.4
5.5
12.6
11.4
2.3
Molybdenum
T
7439-98-7
NS
pq/L
1.6
2.4
8.3
3.4
13
11.6
2.4
Nickel
D
7440-02-0
NS
pq/L
1.8 J+
1.7
1.2 J+
1.7
2.3
3 J+
1.4 J+
Nickel
T
7440-02-0
100
02L
pq/L
1.6 J+
2.3
15.1
7.3
2.9
4.8 J+
2.5 J+
Potassium
T
7440-09-7
NS
pq/L
68800 J-
93800
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
7782-49-2
NS
pq/L
0.38 J
0.35 J
0.67
0.44 J
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.22 J
0.47 J
0.64
0.23 J
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pq/L
42000
58200
43700
35500
32300
24300
14200
Strontium
D
7440-24-6
NS
pq/L
730
3400
380
530
160
160
680
Strontium
T
7440-24-6
NS
pq/L
2900
3900
410
570
180
170
740
Thallium
D
7440-28-0
NS
pq/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 U
0.02 J
0.1 U
0.1 UJ
0.023 J
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pq/L
2.9
0.96 J
5.1
3.2
0.56 J
0.45 J
1 U
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
1.5
0.63 J
5.5
1.7
0.69 J
0.64 J
0.91 J
Zinc
D
7440-66-6
NS
pq/L
10 UJ
10 U
10 U
10 U
10 U
27 J+
10 UJ
Zinc
T
7440-66-6
1000
02L
pg/L
10 UJ
7.2 J
10 U
2.8 J
3.6 J
38
12 J+
Total Dissolved Solids
N
TDS
500000
02L
pg/L
272000
1320000
296000
289000
258000
247000
327000
Total Organic Carbon
N
TOC
NS
pq/L
28400
1200
1200
960 J
1000 U
10700
1000 U
Total Suspended Solids
N
TSS
NS
pq/L
80400
2500 U
10100
5000
22400
12100
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
10000
5000 U
11500
5000 U
5000 U
5000 UJ
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
226000
698000
55900
66600
70800
1000 J+
133000
Alkalinity, lab
N
ALK-LAB
NS
pq/L
236000
698000
67400
66600
70800
1000 J+
133000
Chloride
N
16887-00-6
250000
02L
pg/L
24900
17400
22900
23600
19800
20400
20800
Nitrite as N
N
14797-65-0
1000
02L
pq/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pq/L
13 J+
20 U
20 U
20 U
12 J
20 U
20 UJ
Sulfate
N
14808-79-8
250000
02L
pg/L
33700
19800
99000
99800
83000
84800
96700
Sulfide
N
18496-25-8
NS
pq/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
0.439
0.189
As(V)
T
10103-60-3
NS
pq/L
0.143
0.325
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
4.51
0.039 J+
Fe(II)
T
1345-25-1
NS
pq/L
20 U
20 U
Fe(III)
T
1309-37-1
NS
pq/L
20 UJ
20 U
Mn(II)
T
1344-43-0
NS
pg/L
5 UJ
213
Mn(IV)
T
1313-13-9
NS
pg/L
13.1
5.76
Se(IV)
T
10102-18-8
NS
pg/L
0.5 U
0.5 U
Se(VI)
T
13410-01-0
NS
pq/L
0.5 U
0.5 U
Uranium, Natural
T
7440-61-1
NS
pg/L
1.6
1.3
1.28
Page 1 of 10

Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-10D
AB-10D
AB-25BR
AB-25BR
AB-25D
AB-25D
AB-30BR
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
6/24/2015
9/11/2015
6/26/2015
9/11/2015
6/26/2015
9/12/2015
6/24/2015
N
N
N
N
N
N
N
AB-10D
DR-AB-10D-NS-3Q15
AB-25BR
DR-AB-25BR-NS-3Q15
AB-25D
DR-AB-25D-NS-3Q15
AB-30BR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
1.02
5.47
0.499 J
Radium-228
T
15262-20-1
NS
pCi/L
2.03 J
3 U
3 U
Uranium-233
T
13968-55-3
NS
uq/L
0.05 U
0.05 U
0.05 U
Uranium-234
T
13966-29-5
NS
pq/L
0.05 U
0.05 U
0.05 U
Uranium-236
T
13982-70-2
NS
uq/L
0.05 U
0.05 U
0.05 U
Dissolved Oxygen
N
DO
NS
mg/I
0.2
0.27
0.67
0.51
0.74
Temp (Celcius)
N
TEMP
--
NS
Deg C
22.9
23.1
24A
22.7
23.7
pH (field)
N
PH
6.5
8.5
02L
SU
12.2
9.12
8.47
7.09
7.1
Turbidity, field
N
TURB
NS
NTU
9.4
3.31
5.13
1
6.11
16.71
Spec. Cond. (field)
N
SC
NS
PS/cm
5588
427
440.7
390
374.2
Oxidation Reduction Potential
N
ORP
NS
mV
-197.8
155
5.1
208
127.9
GW Depth (TOC)
I N
GW DEPTH-TOCj
NS
ft
59.23
52.44
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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 10

Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-30BR
AB-30D
AB-30D
AB-30S
AB-30S
AB-35BR
AB-35BR
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
9/10/2015
6/24/2015
9/11/2015
6/29/2015
9/10/2015
6/25/2015
9/10/2015
N
N
N
N
N
N
N
DR-AB-30BR-NS-3Q15
AB-30D
DR-AB-30D-NS-3Q15
AB-30S
DR-AB-30S-NS-3Q15
AB-35BR
DR-AB-35BR-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
100 U
100 U
100 U
110
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pq/L
270
94 J
250
130 J
3400
190
75 J
Antimony
D
7440-36-0
NS
pq/L
0.5 U
2
0.43 J
0.5 UJ
0.5 U
0.51
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
0.5 U
1.5
0.9
2.6 J
0.5 U
0.48 J
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
0.78
0.46 J
0.35 J
0.5 UJ
0.5 U
12
9.3
Arsenic
T
7440-38-2
10
02L
pg/L
0.94
0.41 J
0.41 J+
0.5 U
0.96
11.7
10.5 J
Barium
D
7440-39-3
NS
pq/L
110
82
91
120
110
210
370
Barium
T
7440-39-3
700
02L
pq/L
100
110
95
130
160
240
360
Beryllium
D
7440-41-7
NS
pq/L
0.2 U
0.2 U
0.2 U
0.2 UJ
0.44
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.2 U
0.2 U
0.2 U
0.45
0.84
0.2 U
0.2 U
Boron
D
7440-42-8
NS
pq/L
310
240
290
300
320
270
220
Boron
T
7440-42-8
700
02L
pg/L
300
250
270
290
310
270
240
Cadmium
D
7440-43-9
NS
pq/L
0.08 U
0.08 U
0.08 U
0.08 UJ
0.064 J
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
0.08 U
0.08 U
0.08 U
0.086
0.075 J
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pg/L
70400
52300
57200
8580
5720
84300
79000
Chromium
D
7440-47-3
NS
pq/L
0.21 J
2 J+
0.75
0.78 J+
0.2 J
1.5 J+
0.55
Chromium
T
7440-47-3
10
02L
pg/L
1.7
2.7
3.3
0.99 J+
10.4
3.8
2.3 J
Cobalt
D
7440-48-4
NS
pq/L
0.5 U
0.18 J
0.27 J
0.5 UJ
24.9
0.24 J
0.5 U
Cobalt
T
7440-48-4
1
IMAC
pg/L
0.23 J
0.3 J
0.44 J
29
30.7
0.26 J
0.14 J
Copper
D
7440-50-8
NS
pq/L
1 U
4.5 J+
0.57 J
2.2 J+
0.98 J
1.7 J+
1 U
Copper
T
7440-50-8
1000
02L
pq/L
0.91 J
0.71 J+
1.9
0.97 J+
7.9
3.3 J+
0.86 J
Iron
D
7439-89-6
NS
pq/L
94
50 U
50 J
39 J
33 J
50 U
50 U
Iron
T
7439-89-6
300
1 02L
pg/L
460
97
380
1101
4200
150
93 J
Lead
D
7439-92-1
NS
pq/L
0.1 U
0.051 J+
0.1
0.1 UJ
0.39
0.062 J+
0.1 U
Lead
T
7439-92-1
15
02L
pg/L
0.18
0.14
0.29
0.44 J+
5.1
0.16
0.12
Magnesium
T
7439-95-4
NS
pq/L
11900
7830
9230
5360
4040
14700
13000
Manganese
D
7439-96-5
NS
pq/L
400
280
380
1600
1400
390
150
Manganese
T
7439-96-5
50
02L
pg/L
380
430
360
1500
1100
410
220
Mercury
D
7439-97-6
NS
pq/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pq/L
0.15 J
0.2 U
0.2 UJ
0.2 U
0.12 J
0.2 U
0.2 U
Methane
N
74-82-8
NS
pg/L
40
23.5 J+
20.5
15.8 J+
16.5 J+
20.2 J+
22.3 J
Molybdenum
D
7439-98-7
NS
pq/L
2.9
2.8
1.3
0.5 U
0.5 U
20
21.3
Molybdenum
T
7439-98-7
NS
pq/L
3.2
2.5
1.9
0.5 U
0.29 J
21.4
19.9 J
Nickel
D
7440-02-0
NS
pq/L
0.85
1.5 J+
1.7
0.38 J+
7.8
1.1 J+
0.77
Nickel
T
7440-02-0
100
02L
pq/L
1.8
1.9 J+
2.7
8.6 J+
11.7
1.1 J+
1.4 J
Potassium
T
7440-09-7
NS
pq/L
5000 U
5000 U
5000 U
5000 U
5000 U
13500
14200
Selenium
D
7782-49-2
NS
pq/L
0.5 U
0.28 J
0.5 U
0.5 U
0.5 U
0.32 J
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
0.5 U
0.31 J
0.5 U
0.24 J
0.67
0.5 U
Sodium
T
7440-23-5
NS
pq/L
15900
13800
15400
29400
29600
34400
158000
Strontium
D
7440-24-6
NS
pq/L
870
340
420
150
150
550
730
Strontium
T
7440-24-6
NS
pq/L
770
400
450
150
110
650
690
Thallium
D
7440-28-0
NS
pq/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 U
0.1 U
0.1 U
0.02 J
0.093 J
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pq/L
1 U
0.96 J
0.57 J
1 UJ
1 U
0.99 J
1.5
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
0.67 J
0.86 J
1.1
1 U
18.3
1.8
1.8 J
Zinc
D
7440-66-6
NS
pq/L
10 U
3 J+
21
15 J+
58
4.4 J
10 U
Zinc
T
7440-66-6
1000
02L
pg/L
20
4 J+
43
13 J+
32
9.6 J+
3.7 J
Total Dissolved Solids
N
TDS
500000
02L
pg/L
377000
249000
304000
183000
174000
410000
905000 J
Total Organic Carbon
N
TOC
NS
pq/L
21000
1000 U
1000 U
650 J
760 J
12900
198000 J
Total Suspended Solids
N
TSS
NS
pq/L
14300
2500 U
37600
2500 U
69400
13300
68000 J
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
133000
90900
87800
6200
3600 J
187000
197000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
133000
90900 J-
87800
6200
3600 J
187000
197000
Chloride
N
16887-00-6
250000
02L
pq/L
18000
22100
21900
10200
10400
18800
33600 J
Nitrite as N
N
14797-65-0
1000
02L
pq/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pq/L
20 U
13 J+
20 U
20 UJ
20 U
17 J+
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
106000
71500
79400
81500
74200
129000
195000 J
Sulfide
N
18496-25-8
NS
pq/L
100 U
100 U
100 U
100 U
100 U
100 U
6500 J-
As(III)
T
7784-46-5
NS
pg/L
0.158
0.2 U
9.84 J
As(V)
T
10103-60-3
NS
pq/L
0.12
0.2 U
0.66
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
1.38
0.026 J+
0.871 J
Fe(II)
T
1345-25-1
NS
pq/L
1
10.1
13.9
7.3 J+
Fe(III)
T
1309-37-1
NS
pq/L
20 U
20 U
20 UJ
Mn(II)
T
1344-43-0
NS
pg/L
292
1540
406 J+
Mn(IV)
T
1313-13-9
NS
pg/L
85.2
2.5 UJ
16.9 J+
Se(IV)
T
10102-18-8
NS
pq/L
0.5 U
0.5 U
0.5 U
Se(VI)
T
13410-01-0
NS
pq/L
0.5 U
0.5 U
0.5 UJ
Uranium, Natural
T
7440-61-1
NS
I
I pg/L
Page 3 of 10

Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-30BR
AB-30D
AB-30D
AB-30S
AB-30S
AB-35BR
AB-35BR
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
9/10/2015
6/24/2015
9/11/2015
6/29/2015
9/10/2015
6/25/2015
9/10/2015
N
N
N
N
N
N
N
DR-AB-30BR-NS-3Q15
AB-30D
DR-AB-30D-NS-3Q15
AB-30S
DR-AB-30S-NS-3Q15
AB-35BR
DR-AB-35BR-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
uq/L
Uranium-234
T
13966-29-5
NS
pq/L
Uranium-236
T
13982-70-2
NS
uq/L
Dissolved Oxygen
N
DO
NS
mg/I
0.2
0.6
2.83
0.2
0.84
0.02
Temp (Celcius)
N
TEMP
--
NS
Deg C
26.8
23
21.9
25.3
28.9
32
pH (field)
N
PH
6.5
8.5
02L
SU
7.3
7.4
4.92
4.9
7.57
7.8
Turbidity, field
N
TURB
NS
NTU
9.4
9.7
7.9
8.2
6.27
7.77
Spec. Cond. (field)
N
SC
NS
PS/cm
555
443.9
264.6
255
618
585
Oxidation Reduction Potential
N
ORP
NS
my
-90.6
-90.1
281.7
293.3
124.7
-214.9
GW Depth (TOC)
I N
GW DEPTH-TOCj
NS
I
I ft
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 Results Beneath Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-5D
AB-5D
MW-10
MW-10
MW-10D
MW-10D
MW-11
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (30-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
6/18/2015
9/9/2015
6/25/2015
9/11/2015
6/24/2015
9/11/2015
6/29/2015
N
N
N
N
N
N
N
AB-5D
DR-AB-5D-NS-3Q15
MW-10
DR-MW-10-NS-3Q15
MW-10D
DR-MW-10D-NS-3Q15
MW-11
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pq/L
62 J
180
100 U
100 U
100 U
160
Antimony
D
7440-36-0
NS
pq/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
8.8
14.1
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
T
7440-38-2
10
02L
pg/L
8.5
13.9
0.5 U
0.5 U
0.5 U
0.14 J
Barium
D
7440-39-3
NS
pq/L
89
64
29
40
45
63
Barium
T
7440-39-3
700
02L
pq/L
89
67
32
45
46
72
Beryllium
D
7440-41-7
NS
pq/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.42
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.5
Boron
D
7440-42-8
NS
pq/L
560
630
460
440
460
240
Boron
T
7440-42-8
700
02L
pg/L
500
650
460
460
440
230
Cadmium
D
7440-43-9
NS
pq/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.034 J
Cadmium
T
7440-43-9
2
02L
pg/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.038 J
Calcium
T
7440-70-2
NS
pg/L
34900 J-
40100
41000
33600
33200
2850
Chromium
D
7440-47-3
NS
pq/L
0.2 J+
0.5 U
3.6
0.28 J+
0.5 U
0.36 J+
Chromium
T
7440-47-3
10
02L
pg/L
3.3
1.2
6.6
0.27 J
0.34 J
1.2 J+
Cobalt
D
7440-48-4
NS
pq/L
1 1.1
5.4
0.19 J
0.59
0.59
28.5
Cobalt
T
7440-48-4
1
IMAC
pg/L
1
5.5
0.28 J
0.57
0.57
29.2
Copper
D
7440-50-8
NS
pq/L
0.25 J
0.24 J
1 U
1 U
12
0.54 J+
Copper
T
7440-50-8
1000
02L
pq/L
0.51 J
0.51 J
1 U
0.43 J
0.45 J+
2 J+
Iron
D
7439-89-6
NS
pq/L
63
1100
50 U
130
120
50 U
Iron
T
7439-89-6
300
02L
pg/L
140
1400
50 U
170
150
400
Lead
D
7439-92-1
NS
pg/L
0.1 U
0.08 J
0.1 U
0.1 U
0.88
0.09 J+
Lead
T
7439-92-1
15
02L
pg/L
0.058 J
0.12
0.1 U
0.048 J
0.063 J
1.2 J+
Magnesium
T
7439-95-4
NS
pq/L
7180
7270
13600
11000
11000
1810
Manganese
D
7439-96-5
NS
pq/L
1000
1300
5 U
990
950
890
Manganese
T
7439-96-5
50
02L
pg/L
1000
1300
13
1000
930
880
Mercury
D
7439-97-6
NS
pq/L
0.1 J
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pq/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 UJ
0.2 U
Methane
N
74-82-8
NS
pg/L
19.1 J+
83.8
1.5 J+
1.5 J+
13
10 UJ
1.6 J+
Molybdenum
D
7439-98-7
NS
pq/L
3.6
4.4
0.5 U
0.13 J
0.15 J
0.5 U
Molybdenum
T
7439-98-7
NS
pq/L
3.5
4.4
0.5 U
0.13 J
0.13 J
0.5 U
Nickel
D
7440-02-0
NS
pq/L
3 J+
7
1.4
2.1
1.9
5.5 J+
Nickel
T
7440-02-0
100
02L
pq/L
4.2
7.8
2
2.1
1.7 J+
5.6 J+
Potassium
T
7440-09-7
NS
pq/L
13900
13300
5000 U
5000 U
5000 U
5000 U
Selenium
D
7782-49-2
NS
pq/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pq/L
28400
32800
15800
17300
18200
19800
Strontium
D
7440-24-6
NS
pq/L
390
470
690
270
300
54
Strontium
T
7440-24-6
NS
pq/L
380
460
720
300
300
59
Thallium
D
7440-28-0
NS
pq/L
0.018 J+
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.024 J
0.1 U
0.1 U
0.1 U
0.1 UJ
0.023 J
Vanadium
D
7440-62-2
NS
pq/L
1 U
1 U
1 U
1 U
1 U
0.46 J
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
0.77 J
1 U
1 U
1 U
1 U
2.6
Zinc
D
7440-66-6
NS
pq/L
3.8 J
10 U
10 U
10 UJ
10 U
5.7 J+
Zinc
T
7440-66-6
1000
02L
pg/L
5.6 J+
3.7 J
10 U
10 U
10 U
6.8 J+
Total Dissolved Solids
N
TDS
500000
02L
pg/L
247000
253000
233000
297000
214000
213000
118000
Total Organic Carbon
N
TOC
NS
pq/L
1000 U
590 J
1200
1400
510 J
30100
1400
Total Suspended Solids
N
TSS
NS
pq/L
5000
7400
5000 U
2500 U
3300
38300
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pq/L
131000
129000
124000
135000
95300
89200
5000 U
Alkalinity, lab
N
ALK-LAB
NS
pg/L
131000
129000
124000
135000
95300
89200
5000 U
Chloride
N
16887-00-6
250000
02L
pq/L
15500
14200
20400
22700
24100
23200
6500
Nitrite as N
N
14797-65-0
1000
02L
pq/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pq/L
20 U
20 U
1500
640 J-
11 J
20 UJ
110 J+
Sulfate
N
14808-79-8
250000
02L
pg/L
45200
55700
26800
28800
41300
42200
48100
Sulfide
N
18496-25-8
NS
pq/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pq/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pq/L
Fe(III)
T
1309-37-1
NS
pq/L
Mn(II)
T
1344-43-0
NS
pq/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
NS
pq/L
Se(VI)
T
13410-01-0
NS
pg/L
Uranium, Natural
T
7440-61-1
NS
pq/L
0.197 J
Page 5 of 10

Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-5D
AB-5D
MW-10
MW-10
MW-10D
MW-10D
MW-11
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (30-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
6/18/2015
9/9/2015
6/25/2015
9/11/2015
6/24/2015
9/11/2015
6/29/2015
N
N
N
N
N
N
N
AB-5D
DR-AB-5D-NS-3Q15
MW-10
DR-MW-10-NS-3Q15
MW-10D
DR-MW-10D-NS-3Q15
MW-11
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
1 UJ
Radium-228
T
15262-20-1
NS
pCi/L
3 U
Uranium-233
T
13968-55-3
NS
uq/L
0.05 U
Uranium-234
T
13966-29-5
NS
pq/L
0.05 U
Uranium-236
T
13982-70-2
NS
uq/L
0.05 U
Dissolved Oxygen
N
DO
NS
mg/I
0.2
5.4
1.74
0.62
3.61
Temp (Celcius)
N
TEMP
--
NS
Deg C
24.8
20.8
20.4
19.1
24.5
pH (field)
N
PH
6.5
8.5
02L
SU
6.3
6.21
6.2
6.22
4.77
Turbidity, field
N
TURB
NS
NTU
8.5
5.4
1.2
1.1
5.53
Spec. Cond. (field)
N
SC
NS
PS/cm
431 A
340
330
336
160.5
Oxidation Reduction Potential
N
ORP
NS
my
-33.1
119
163
80
398
GW Depth (TOC)
N
JGW DEPTH-TOCj
NS
I
I ft
13.28
18.3
50
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 Results Beneath Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-11
MW-11D
MW-308BR
MW-308BR
MW-310BR
MW-310BR
MW-311BR
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
9/11/2015
6/29/2015
6/15/2015
9/9/2015
6/16/2015
9/9/2015
6/29/2015
N
N
N
N
N
N
N
DR-MW-11-NS-3Q15
MW-11D
MW-308BR
DR-MW-308BR-NS-3Q15
MW-310BR
DR-MW-310BR-NS-3Q15
MW-311BR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
100 U
100 U
9.7 J+
100 U
5.7 J
100 U
100 U
Aluminum
T
7429-90-5
NS
pq/L
790
740
483
120
659
580
910
Antimony
D
7440-36-0
NS
pq/L
0.5 U
0.5 U
0.22 J
0.5 U
0.32 J
1.4
0.22 J
Antimony
T
7440-36-0
1
IMAC
pg/L
0.5 U
0.5 U
0.24 J
0.39 J
0.34 J
0.99
0.3 J
Arsenic
D
7440-38-2
NS
pg/L
0.5 U
0.18 J
1.7
0.67
1.1
2.7
0.35 J
Arsenic
T
7440-38-2
10
02L
pg/L
0.5 U
0.25 J
1.8
0.79
1.3
2.5
0.32 J
Barium
D
7440-39-3
NS
pq/L
71
54
69
69
56
33
94
Barium
T
7440-39-3
700
02L
pq/L
81
54
76
69
57
46
110
Beryllium
D
7440-41-7
NS
pg/L
0.46
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.46
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
D
7440-42-8
NS
pq/L
290
91
260 J+
440
31 J
49 J
700
Boron
T
7440-42-8
700
02L
pg/L
280
87
260
360
35 J+
40 J
690
Cadmium
D
7440-43-9
NS
pq/L
0.046 J
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
0.046 J
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pg/L
3270
62500
169000
232000
34700
26100
53400
Chromium
D
7440-47-3
NS
pq/L
0.24 J
1.1 J+
0.5 U
0.17 J
1.7 J+
0.63
0.37 J+
Chromium
T
7440-47-3
10
02L
pg/L
0.58
1.5 J+
1.5
0.8
2.3
2.8
3.3 J+
Cobalt
D
7440-48-4
NS
pq/L
33.9
0.5 U
0.32 J
141
0.5 U
0.5 U
0.52
Cobalt
T
7440-48-4
1
IMAC
pg/L
30.5
0.22 J
0.6
9.3
0.2 J
0.21 J
0.84
Copper
D
7440-50-8
NS
pq/L
2.5
0.55 J+
1 U
1 U
0.26 J+
0.36 J
1 UJ
Copper
T
7440-50-8
1000
02L
pq/L
0.49 J+
1.8 J+
0.54 J+
0.46 J
0.91 J+
1.2
2.6 J+
Iron
D
7439-89-6
NS
pq/L
50 U
50 U
1190
7600
50 U
50 U
380
Iron
T
7439-89-6
300
02L
pg/L
1300
850
1910
5300
377
410
1200
Lead
D
7439-92-1
NS
pg/L
0.24
0.1 UJ
0.1 U
0.1 U
0.1 UJ
0.058 J
0.1 UJ
Lead
T
7439-92-1
15
02L
pg/L
0.32
0.29 J+
0.22 J+
0.16
0.88
1.1
0.53 J+
Magnesium
T
7439-95-4
NS
pq/L
2090
8020
28000
42800
6510
3980
11200
Manganese
D
7439-96-5
NS
pq/L
930
100
2000
7700
120
8.2
570
Manganese
T
7439-96-5
50
02L
pg/L
910
130
2200
5400
110
37
580
Mercury
D
7439-97-6
NS
pq/L
0.2 U
0.2 U
0.2 U
0.2 U
0.092 J+
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pq/L
0.2 UJ
0.2 U
0.2 UJ
0.2 U
0.082 J+
0.2 U
0.2 U
Methane
N
74-82-8
NS
pg/L
2.1 J+
7.6 J+
27
32.8
10 U
4.4 J+
8.5 J+
Molybdenum
D
7439-98-7
NS
pq/L
0.5 U
3.4
7.6
0.61
1.8
3.4
5
Molybdenum
T
7439-98-7
NS
pq/L
0.5 U
2.4
8.1
1.8
1.9
2.9
5
Nickel
D
7440-02-0
NS
pq/L
6
1.4 J+
0.98 J+
11.9
0.35 J+
1.1
2.9 J+
Nickel
T
7440-02-0
100
02L
pq/L
5.9
1.4 J+
1.7 J+
8.2
0.88 J+
2.3
4 J+
Potassium
T
7440-09-7
NS
pq/L
5000 U
3050 J
5000 U
5000 U
5000 U
5000 U
5910
Selenium
D
7782-49-2
NS
pq/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.39 J
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
0.21 J
0.41 J
0.5 U
Sodium
T
7440-23-5
NS
pq/L
21200
14000
20100
23300
21200
23600
23800
Strontium
D
7440-24-6
NS
pq/L
64
480
1200
2000
190
160
920
Strontium
T
7440-24-6
NS
pq/L
64
510
1300
1700
200
190
980
Thallium
D
7440-28-0
NS
pq/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 UJ
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.017 J+
0.021 J
0.1 U
0.1 U
0.1 UJ
0.016 J
0.016 J
Vanadium
D
7440-62-2
NS
pq/L
0.67 J
0.5 J+
1 U
1 U
2.1
4.9
0.38 J+
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
0.58 J
1 U
0.84 J
1 U
2.5
3.7
0.89 J
Zinc
D
7440-66-6
NS
pq/L
15
10 UJ
9.8 J+
3.1 J
10 U
10 U
3.8 J+
Zinc
T
7440-66-6
1000
02L
pg/L
6.5 J
4.6 J+
6.8 J+
3 J
5.7 J
6.7 J
15 J+
Total Dissolved Solids
N
TDS
500000
02L
pg/L
1 143000
304000
844000
1300000
183000
161000
318000
Total Organic Carbon
N
TOC
NS
I
pq/L
1500
1000 U
610 J
1000 U
800 J
840 J
27400
Total Suspended Solids
N
TSS
NS
pq/L
11400
9200
19700
16400
36700
41400
55300
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
5000 U
5000 U
10000 U
5000 U
10000 U
8800
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pq/L
5000 U
124000
170000
140000
110000
73700
154000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
5000 U
124000
170000
140000
110000
82500
154000
Chloride
N
16887-00-6
250000
02L
pq/L
7600
23600
11600
13100
11600
12700
22000
Nitrite as N
N
14797-65-0
1000
02L
pq/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pq/L
100 J-
65 J+
20 U
11 J
20 U
20 U
14 J+
Sulfate
N
14808-79-8
250000
02L
pg/L
48600
70000
323000
586000
14100
18700
53000
Sulfide
N
18496-25-8
NS
pq/L
100 U
100 U
200 U
100 U
1000 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pq/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pq/L
Fe(III)
T
1309-37-1
NS
pq/L
Mn(II)
T
1344-43-0
NS
pq/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
NS
pq/L
Se(VI)
T
13410-01-0
NS
pq/L
Uranium, Natural
T
7440-61-1
NS
pq/L
0.391
Page 7 of 10

Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-11
MWA1D
MW-308BR
MW-308BR
MW-310BR
MW-310BR
MW-311BR
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
9/11/2015
6/29/2015
6/15/2015
9/9/2015
6/16/2015
9/9/2015
6/29/2015
N
N
N
N
N
N
N
DR-MW-11-NS-3Q15
MWA1D
MW-308BR
DR-MW-308BR-NS-3Q15
MW-310BR
DR-MW-310BR-NS-3Q15
MW-311BR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
2.02
Radium-228
T
15262-20-1
NS
pCi/L
3 U
Uranium-233
T
13968-55-3
NS
uq/L
0.05 U
Uranium-234
T
13966-29-5
NS
pq/L
0.05 U
Uranium-236
T
13982-70-2
NS
uq/L
0.05 U
Dissolved Oxygen
N
DO
NS
mg/I
0.06
2.24
0.49
0.2
0.28
0.9
0.77
Temp (Celcius)
N
TEMP
--
NS
Deg C
19.8
22
31.4
22.3
32.8
25.2
24
pH (field)
N
PH
6.5
8.5
02L
SU
3.11
7.78
7.05
6.6
8.16
8.8
7.05
Turbidity, field
N
TURB
--
NS
NTU
26
5.26
5A5
6.2
9.92
9.1
39.18
Spec. Cond. (field)
N
SC
NS
PS/cm
147
454.4
1096
1628
283.9
241.3
505
Oxidation Reduction Potential
N
ORP
NS
my
185
132.5
-20.4
-89
121.6
75.8
-120.9
GW Depth (TOC)
N
JGW DEPTH-TOCj
NS
I
I ft
13.84
18.1
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 Results Beneath Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-311BR
MW-314BR
MW-314BR
MW-9
MW-9D
MW-9D
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
9/11/2015
6/25/2015
9/11/2015
6/30/2015
6/24/2015
9/11/2015
N
N
N
N
N
N
DR-MW-311BR-NS-3Q15
MW-314BR
DR-MW-314BR-NS-3Q15
MW-9
MW-9D
DR-MW-9D-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pq/L
560
350
120
250
2400
1300
Antimony
D
7440-36-0
NS
pq/L
0.5 U
0.53
1.3
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
0.5 U
0.47 J
1.6
0.5 U
0.5 U
0.27 J
Arsenic
D
7440-38-2
NS
pg/L
0.18 J
0.36 J
1.7
0.14 J
0.5 U
0.5 U
Arsenic
T
7440-38-2
10
02L
pg/L
0.5 U
0.3 J
1.8 J+
0.27 J
0.21 J
0.12 J+
Barium
D
7440-39-3
NS
pq/L
94
19
20
64
4 J
3.5 J
Barium
T
7440-39-3
700
02L
pq/L
110
24
25
70
19
22
Beryllium
D
7440-41-7
NS
pq/L
0.2 U
0.2 U
0.2 U
0.11 J
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.2 U
0.2 U
0.2 U
0.21
0.19 J
0.1 J
Boron
D
7440-42-8
NS
pq/L
790
510
460
50 U
1000
1000
Boron
T
7440-42-8
700
02L
pg/L
810
500
490
28 J
1000
1100
Cadmium
D
7440-43-9
NS
pq/L
0.08 U
0.08 U
0.08 U
0.08 U
0.15
0.059 J
Cadmium
T
7440-43-9
2
02L
pg/L
0.08 U
0.08 U
0.03 J
0.031 J
1.8
0.12
Calcium
T
7440-70-2
NS
pg/L
53900
47400
48600
11400
21100
20800
Chromium
D
7440-47-3
NS
pq/L
0.25 J
0.87 J+
0.32 J
2.5
0.45 J+
0.58
Chromium
T
7440-47-3
10
02L
pg/L
2.1
5
0.96 J+
1.8 J+
7.1
3.6
Cobalt
D
7440-48-4
NS
pq/L
0.13 J
0.5 U
0.5 U
5.6
0.28 J
0.37 J
Cobalt
T
7440-48-4
1
IMAC
pg/L
0.52
0.34 J
0.17 J
6.4
1.5
2.7
Copper
D
7440-50-8
NS
pq/L
1.1
2.1 J+
4.3
1 UJ
0.34 J
8.4
Copper
T
7440-50-8
1000
02L
pq/L
0.72 J
1.2 J+
0.79 J+
10.9
8.7
3.1 J+
Iron
D
7439-89-6
NS
pq/L
470
50 U
28 J
340
50 U
50 U
Iron
T
7439-89-6
300
02L
pg/L
1100
380
160
990
2600
1400
Lead
D
7439-92-1
NS
pg/L
0.25
0.1 U
0.77
0.1 U
0.1 U
0.92
Lead
T
7439-92-1
15
1 02L
pg/L
1 0.38
0.21
0.15
1.4
1.6
0.78
Magnesium
T
7439-95-4
NS
pq/L
11500
13400
12900
7310
9180
9190
Manganese
D
7439-96-5
NS
pq/L
510
15
70
1600
540
610
Manganese
T
7439-96-5
50
02L
pg/L
540
25
65
1000
600
1100
Mercury
D
7439-97-6
NS
pq/L
0.2 U
0.23
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pq/L
0.2 U
0.2 U
0.2 U
0.095 J
0.2 U
0.2 U
Methane
N
74-82-8
NS
pg/L
11.4
2.5 J+
18.3
1.6 J+
10 U
12.8 J+
Molybdenum
D
7439-98-7
NS
pq/L
0.6
0.72 J+
2.1
0.1 J
9.7
9.4
Molybdenum
T
7439-98-7
NS
pq/L
0.63
0.91
2
0.5 U
10.1
9.4
Nickel
D
7440-02-0
NS
pq/L
2.6
1.2 J+
1.5
1.7
2.6
3.3
Nickel
T
7440-02-0
100
02L
pq/L
3.1
3.4 J+
1.9 J+
1.2 J+
5.2
4.2 J+
Potassium
T
7440-09-7
NS
pq/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
7782-49-2
NS
pq/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pq/L
16900
11400
13200
14300
25400
26800
Strontium
D
7440-24-6
NS
pq/L
920
160
170
120
100
130
Strontium
T
7440-24-6
NS
pq/L
930
160
170
130
120
140
Thallium
D
7440-28-0
NS
pq/L
0.1 U
0.1 U
0,039 J
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 U
0.016 J
0.045 J+
0.1 U
0.035 J
0.016 J+
Vanadium
D
7440-62-2
NS
pq/L
0.5 J
0.65 J
0.63 J
0.47 J
0.5 J
0.74 J
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
0.62 J
1.3
0.82 J
2.3
11.1
2.7
Zinc
D
7440-66-6
NS
pq/L
10 U
10 U
5.9 J
8.5 J
10 UJ
10 U
Zinc
T
7440-66-6
1000
02L
pg/L
8.9 J
5.5 J+
7.9 J
8.5 J
6.1 J
4.8 J
Total Dissolved Solids
N
TDS
500000
02L
pg/L
272000
261000
289000
113000
238000
213000
Total Organic Carbon
N
TOC
NS
pq/L
1000 U
1000 U
1000 U
1700
1000 U
1000 U
Total Suspended Solids
N
TSS
NS
pq/L
18500
12600
14500
2500 U
49000
264000
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
127000
56700
60000
35200
32400
29600
Alkalinity, lab
N
ALK-LAB
NS
pg/L
127000
56700
60000
35200
32400
29600
Chloride
N
16887-00-6
250000
02L
pq/L
23000
30500
30500
13000 J-
20000
19900
Nitrite as N
N
14797-65-0
1000
02L
pq/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pq/L
20 U
20 U
20 U
230
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
53800
95800
98200
36100
87300
91400
Sulfide
N
18496-25-8
NS
pq/L
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pq/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pq/L
Fe(III)
T
1309-37-1
NS
pq/L
Mn(II)
T
1344-43-0
NS
pq/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
NS
pq/L
Se(VI)
T
13410-01-0
NS
pq/L
Uranium, Natural
T
7440-61-1
NS
pq/L
Page 9 of 10

Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-311BR
MW-314BR
MW-314BR
MW-9
MW-9D
MW-9D
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
9/11/2015
6/25/2015
9/11/2015
6/30/2015
6/24/2015
9/11/2015
N
N
N
N
N
N
DR-MW-311BR-NS-3Q15
MW-314BR
DR-MW-314BR-NS-3Q15
MW-9
MW-9D
DR-MW-9D-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
uq/L
Uranium-234
T
13966-29-5
NS
pq/L
Uranium-236
T
13982-70-2
NS
uq/L
Dissolved Oxygen
N
DO
NS
mg/I
0.25
0.99
0.38
1.68
0.52
0.21
Temp (Celcius)
N
TEMP
--
NS
Deg C
18
26.7
21.6
21.7
20.8
22.8
pH (field)
N
PH
6.5
8.5
02L
SU
6.9
7.39
7.64
6.73
6.57
6.44
Turbidity, field
N
TURB
NS
NTU
20.6
7.63
8.35
84.09
66
48.29
Spec. Cond. (field)
N
SC
NS
PS/cm
807
414.9
306.2
219.4
324
228.9
Oxidation Reduction Potential
N
ORP
NS
my
-47.1
108.3
-129.3
179.9
145
110.8
GW Depth (TOC)
I N
GW DEPTH-TOCj
NS
I
I ft
45.1
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 Results Beneath Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AS-10D
AS-10D
AS-12D
AS-12S
AS-12S
AS-21D
AS-2D
Round 1 (CSA Sampling)
Round 2 (30-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (30-2015)
6/8/2015
9/8/2015
6/9/2015
6/9/2015
9/8/2015
6/17/2015
9/3/2015
N
N
N
N
N
N
N
AS-10D
DR-AS-10D-NS-3Q15
DR_AS-12D WG_20150609
AS-12S
DR-AS-12S-NS-3Q15
AS-21D
DR-AS-2D-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pg/L
578
810
13.1 J+
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pg/L
730
920
554 J+
100 U
760
650
Antimony
D
7440-36-0
NS
pg/L
2.7
3.4
0.24 J
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
2.9
3.8
0.23 J
0.5 U
0.16 J
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
8.5
7.6
0.48 J
0.23 J
0.24 J
0.17 J
Arsenic
T
7440-38-2
10
02L
pg/L
8.9
7.5
0.52
0.28 J
0.29 J
0.38 J
Barium
D
7440-39-3
NS
pg/L
30
16
33
31
120
170
Barium
T
7440-39-3
700
02L
pg/L
32
19
37
29
130
190
Beryllium
D
7440-41-7
NS
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.096 J
0.1 J
Boron
D
7440-42-8
NS
pg/L
50 U
26 J
1000
1300
150
360
Boron
T
7440-42-8
700
02L
pg/L
29 J
31 J
1000
1200
160
410
Cadmium
D
7440-43-9
NS
pg/L
0.08 U
0.08 U
0.2
0.036 J
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
0.08 U
0.08 U
0.19
0.04 J
0.041 J
0.08 U
Calcium
T
7440-70-2
NS
pg/L
65000
49900
40700
45900
72500
96600
Chromium
D
7440-47-3
NS
pg/L
2 J
2.2
0.22 J+
0.49 J
0.58
0.73
Chromium
T
7440-47-3
10
02L
pg/L
2.4
2.9
1.1 J+
1.1 J+
1.4
2.3
Cobalt
D
7440-48-4
NS
pg/L
0.5 U
0.5 U
2
1.2
1.6
0.81
Cobalt
T
7440-48-4
1
IMAC
pg/L
0.5 U
0.5 U
2.2
1.3
2.1
1.2
Copper
D
7440-50-8
NS
pg/L
0.76 J+
3.6
0.4 J+
6.8
0.76 J+
0.46 J
Copper
T
7440-50-8
1000
02L
pg/L
1.2 J+
2.1
1.1 J+
0.46 J
1 UJ
1.1
Iron
D
7439-89-6
NS
pg/L
50 U
50 U
82.6
370
1800
1800
Iron
T
7439-89-6
300
02L
pg/L
35.6 J
69
928
450
2900
2800
Lead
D
7439-92-1
NS
pg/L
0.077 J
0.69
0.1 U
0.51
0.1 U
0.17
Lead
T
7439-92-1
15
02L
pg/L
0.1 U
0.095 J
0.5 J+
0.11
0.54
0.48
Magnesium
T
7439-95-4
NS
pg/L
59.2 J
100 U
30600
35700
16700
27400
Manganese
D
7439-96-5
NS
pg/L
5 U
5 U
420
330
1500
1900
Manganese
T
7439-96-5
50
02L
pg/L
5 U
3.4 J
430
320
1500
2100
Mercury
D
7439-97-6
NS
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 UJ
0.2 U
Mercury
T
7439-97-6
1
02L
pg/L
0.2 U
0.2 U
0.12 J
0.2 U
0.085 J+
0.2 U
Methane
N
74-82-8
NS
pg/L
10 U
14.4 J+
10 U
9.4 J+
10 U
5.8 J+
Molybdenum
D
7439-98-7
NS
pg/L
3.8
4.5
2.8
0.59
1
0.84
Molybdenum
T
7439-98-7
NS
pg/L
3.9
4.7
2.5
0.64
1
0.86
Nickel
D
7440-02-0
NS
pg/L
0.5 U
0.4 J
9.6
5.7
1.8 J+
1.6
Nickel
T
7440-02-0
100
02L
pg/L
0.23 J
0.92
9.8
5.4
2.8 J+
2.4
Potassium
T
7440-09-7
NS
pg/L
5000 U
4210 J
5000 U
5000 U
3120 J
5000 U
Selenium
D
7782-49-2
NS
pg/L
28.8
31.3
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
35.3
31
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pg/L
9700
11800
29000
33600
29700
26600
Strontium
D
7440-24-6
NS
pg/L
320
300
600
700
510
630
Strontium
T
7440-24-6
NS
pg/L
350
350
600
660
530
700
Thallium
D
7440-28-0
NS
pg/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 U
0.1 U
0.1 U
0.1 U
0.061 J
0.023 J+
Vanadium
D
7440-62-2
NS
pg/L
13.3
30.6
0.29 J
0.32 J
0.32 J
1 U
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
15.3
30.6
1.1
0.52 J
1.6
1.4
Zinc
D
7440-66-6
NS
pg/L
10 U
3.3 J
10 U
27
8.4 J
2.7 J
Zinc
T
7440-66-6
1000
02L
pg/L
5.4 J+
6.3 J
4.2 J+
43
16 J+
4.8 J
Total Dissolved Solids
N
TDS
500000
02L
pg/L
220000 J-
202000
350000
321000
405000
498000
Total Organic Carbon
N
TOC
NS
pg/L
1000 U
1600
1600
1500
1500
1200
Total Suspended Solids
N
TSS
NS
pg/L
1100
5000 U
89000
2500 U
189000
133000
Alkalinity, CO3
N
ALK-CO3
NS
pg/L
63000
54900
10000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
23000
5000 U
190000
192000
170000
224000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
100000
77200
190000
192000
170000
224000
Chloride
N
16887-00-6
250000
02L
pg/L
20300
19700
18700
21400
16900
17100
Nitrite as N
N
14797-65-0
1000
02L
pg/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
20 U
20 U
32
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
43900
43800
71700
83100 J-
90600
135000
Sulfide
N
18496-25-8
NS
pg/L
100 U
100 U
200 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pg/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pg/L
Fe(III)
T
1309-37-1
NS
pg/L
Mn(II)
T
1344-43-0
NS
pg/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
NS
pg/L
Se(VI)
T
13410-01-0
NS
pg/L
Uranium, Natural
T
7440-61-1
NS
pg/L
Page 1 of 10

Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AS-10D
AS-10D
AS-12D
AS-12S
AS-12S
AS-21)
AS-2D
Round 1 (CSA Sampling)
Round 2 (30-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (30-2015)
6/8/2015
9/8/2015
6/9/2015
6/9/2015
9/8/2015
6/17/2015
9/3/2015
N
N
N
N
N
N
N
AS-10D
DR-AS-10D-NS-3Q15
DR_AS-12D WG 20150609
AS-12S
DR-AS-12S-NS-3Q15
AS-21D
DR-AS-2D-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
ug/I
Uranium-234
T
13966-29-5
NS
uq/I
Uranium-236
T
13982-70-2
NS
uq/1
Dissolved Oxygen
N
DO
NS
mq/L
2.38
2.2
1.29
0.25
0.12
Temp (Celcius)
N
TEMP
NS
Deg C
27.5
24.9
30.1
24.2
24A
pH (field)
N
PH
6.5
8.5
02L
SU
10.67
10.7
5.95
6.1
6.32
Turbidity, field
N
TURB
--
NS
NTU
3.58
4.3
9.26
1.47
6.12
Spec. Cond. (field)
N
Sc
NS
pS/cm
582
388.5
606
643
553
Oxidation Reduction Potential
N
ORP
NS
my
104
-21.7
222.2
167.6
-180.9
GW Depth (TOC)
N
JGW DEPTH_TOCI
NS
ft
26.42
18.43
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AS-4D
AS-4D
AS-4D
AS-6D
AS-611)
AS-8BR
AS-8BR
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (30-2015)
6/5/2015
6/26/2015
9/3/2015
6/8/2015
9/8/2015
6/9/2015
9/8/2015
N
N
N
N
N
N
N
AS-4D
AS-4D
DR-AS-4D-NS-3Q15
AS-6D
DR-AS-6D-NS-3Q15
AS-8BR
DR-AS-8BR-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pg/L
5.1 J
98 J
7.8 J
100 U
13.3 J+
100 U
Aluminum
T
7429-90-5
NS
pg/L
2990
100 J
206
110
331 J+
100 U
Antimony
D
7440-36-0
NS
pg/L
0.5 U
0.5 U
0.16 J
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
0.5 U
0.5 U
0.24 J
0.5 U
0.21 J
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
1.5
1.5
1.5
0.86
0.16 J
0.5 U
Arsenic
T
7440-38-2
10
02L
pg/L
1.8
1.6
2
0.88
0.34 J
0.12 J
Barium
D
7440-39-3
NS
pg/L
86
88
43
42
78
77
Barium
T
7440-39-3
700
02L
pg/L
97
100
45
49
95
86
Beryllium
D
7440-41-7
NS
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.18 J
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
D
7440-42-8
NS
pg/L
730
800
33 J
50 U
33 J
50 U
Boron
T
7440-42-8
700
02L
pg/L
810
930
37 J
25 J
45 J
50 U
Cadmium
D
7440-43-9
NS
pg/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pg/L
72800
88700
16300
18000
84600
66600
Chromium
D
7440-47-3
NS
pg/L
0.2 J+
0.19 J+
0.24 J
0.32 J
1.4 J+
0.3 J
Chromium
T
7440-47-3
10
02L
pg/L
3.3
0.91 J+
0.47 J
1.9 J+
4.4
0.5 UJ
Cobalt
D
7440-48-4
NS
pg/L
2.4
2.7
1.1
0.59
0.5 U
0.5 U
Cobalt
T
7440-48-4
1
IMAC
pg/L
4
2.9
1.1
0.7
0.15 J
0.5 U
Copper
D
7440-50-8
NS
pg/L
1 UJ
1 UJ
1 U
0.78 J
1 U
1 U
Copper
T
7440-50-8
1000
02L
pg/L
3.6 J+
1 U
0.54 J+
0.84 J+
0.88 J
0.25 J+
Iron
D
7439-89-6
NS
pg/L
158
170
2880
3100
206
150
Iron
T
7439-89-6
300
02L
pg/L
4480
250 J+
3920
3400
466
170 J+
Lead
D
7439-92-1
NS
pg/L
0.089 J
0.059 J+
0.1 U
0.14
0.048 J+
0.1 U
Lead
T
7439-92-1
15
02L
pg/L
1.7
0.28 J
0.087 J
0.24 J+
0.19 J+
0.1 U
Magnesium
T
7439-95-4
NS
pg/L
37500
44600
20300
26300
10800
11600
Manganese
D
7439-96-5
NS
pg/L
700
770
260
220
790
920
Manganese
T
7439-96-5
50
02L
pg/L
770
870
270
250
910
950
Mercury
D
7439-97-6
NS
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
pg/L
41
22.7 J
68
106
20
15.6 J+
Molybdenum
D
7439-98-7
NS
pg/L
6.8
7.6
0.64
0.15 J
1.4 J+
0.13 J
Molybdenum
T
7439-98-7
NS
pg/L
7.2
7.8
0.35 J
0.2 J
1.8
0.14 J
Nickel
D
7440-02-0
NS
pg/L
2.1
2.5 J+
1.5 J
0.88
0.85 J+
0.34 J
Nickel
T
7440-02-0
100
02L
pg/L
5.2 J+
3
1.5
1.3 J+
1.2 J+
0.33 J+
Potassium
T
7440-09-7
NS
pg/L
2600 J
2770 J
5000 U
5000 U
4810 J
5000 U
Selenium
D
7782-49-2
NS
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pg/L
22300
26100
20400
22800
14000
13000
Strontium
D
7440-24-6
NS
pg/L
920
970
150
150
400
380
Strontium
T
7440-24-6
NS
pg/L
980
1100
160
180
440
440
Thallium
D
7440-28-0
NS
pg/L
0.1 U
0.1 U
0.1 U
0.1 U
0.034 J
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.034 J
0.022 J+
0.1 U
0.1 U
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pg/L
1 U
1 U
1 U
1 U
1.4
1 U
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
4.8
1 U
0.69 J+
0.4 J
2.7
1 U
Zinc
D
7440-66-6
NS
pg/L
7.5 J
10 UJ
7.3 J
12
10 U
10 U
Zinc
T
7440-66-6
1000
02L
pg/L
2.6 J+
10 U
12 J+
18
4.5 J+
10 U
Total Dissolved Solids
N
TDS
500000
02L
pg/L
410000 J-
432000
220000 J-
237000
370000
314000
Total Organic Carbon
N
TOC
NS
pg/L
1200
1200
640 J
2000 U
1000 U
1000 U
Total Suspended Solids
N
TSS
NS
pg/L
90000
47400
5500
12900
38000
2500 U
Alkalinity, CO3
N
ALK-CO3
NS
pg/L
10000 U
5000 U
10000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
310000
336000 J
140000
152000
150000
158000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
310000
336000 J
140000
152000
150000
158000 J+
Chloride
N
16887-00-6
250000
02L
pg/L
21900
22400
16300
16500
8200
4800
Nitrite as N
N
14797-65-0
1000
02L
pg/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
20 U
20 U
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
44900
49400
15100
15600
74500
59700
Sulfide
N
18496-25-8
NS
pg/L
500 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
1.41
As(V)
T
10103-60-3
NS
pg/L
0.2 U
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
0.007 J+
Fe(II)
T
1345-25-1
NS
pg/L
148
Fe(III)
T
1309-37-1
NS
pg/L
20 U
Mn(II)
T
1344-43-0
NS
pg/L
951
Mn(IV)
T
1313-13-9
NS
pg/L
1 UJ
Se(IV)
T
10102-18-8
NS
pg/L
0.5 U
Se(VI)
T
13410-01-0
NS
pg/L
0.5 U
Uranium, Natural
T
7440-61-1
NS
pg/L
Page 3 of 10

Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AS-4D
AS-4D
AS-4D
AS-6D
AS-611)
AS-81BR
AS-81BR
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (30-2015)
6/5/2015
6/26/2015
9/3/2015
6/8/2015
9/8/2015
6/9/2015
9/8/2015
N
N
N
N
N
N
N
AS-4D
AS-4D
DR-AS-4D-NS-3Q15
AS-6D
DR-AS-6D-NS-3Q15
AS-81BR
DR-AS-81BR-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
ug/I
Uranium-234
T
13966-29-5
NS
uq/I
Uranium-236
T
13982-70-2
NS
uq/1
Dissolved Oxygen
N
DO
NS
mq/L
0.36
0.43
0.41
1.46
0.31
Temp (Celcius)
N
TEMP
NS
Deg C
25.2
27.8
24.8
24.6
19.8
pH (field)
N
PH
6.5
8.5
02L
SU
6.24
6.02
6
7.09
7.07
Turbidity, field
N
TURB
--
NS
NTU
7.49
9.3
8.32
51.38
0.88
Spec. Cond. (field)
N
Sc
NS
PS/cm
744
380.8
420.6
496.5
458
Oxidation Reduction Potential
N
ORP
NS
my
169.5
113.2
29.9
20
-59.4
GW Depth (TOC)
N
JGW DEPTH_TOCI
NS
ft
36.5
37.97
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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 Januar,
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 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AS-8D
AS-8D
AS-8D
MW-301BR
MW-301BR
MW-303BR
MW-303BR
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (30-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
6/2/2015
6/26/2015
9/9/2015
6/11/2015
9/4/2015
6/12/2015
6/22/2015
N
N
N
N
N
N
N
AS-8D
AS-8D
DR-AS-8D-NS-3Q15
MW-301BR
DR-MW-301BR-NS-3Q15
MW-303BR
MW-303BR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pg/L
7 J
100 U
5.9 J
100 U
4.7 J
Aluminum
T
7429-90-5
NS
pg/L
1530
62 J
202
230 J+
938
Antimony
D
7440-36-0
NS
pg/L
1 UJ
0.5 U
0.5 U
0.5 U
0.16 J
Antimony
T
7440-36-0
1
IMAC
pg/L
1 UJ
0.5 U
0.16 J
0.5 U
0.25 J
Arsenic
D
7440-38-2
NS
pg/L
1.2 J
0.41 J
0.84
0.64
6.4
Arsenic
T
7440-38-2
10
02L
pg/L
1.24 J
0.38 J
0.9
0.58
8.6
Barium
D
7440-39-3
NS
pg/L
64
69
33
21
69
Barium
T
7440-39-3
700
02L
pg/L
82
71
35
26
94
Beryllium
D
7440-41-7
NS
pg/L
1 UJ
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
1 UJ
0.2 U
0.2 U
0.2 U
0.2 UJ
Boron
D
7440-42-8
NS
pg/L
50 UJ
50 U
50 U
50 U
50 U
Boron
T
7440-42-8
700
02L
pg/L
50 UJ
50 U
50 U
50 U
29 J+
Cadmium
D
7440-43-9
NS
pg/L
1 UJ
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
1 UJ
0.08 UJ
0.08 U
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pg/L
47000
46700
43100
30200
34700
Chromium
D
7440-47-3
NS
pg/L
1 UJ
0.54
4.4
0.32 J
0.27 J
Chromium
T
7440-47-3
10
02L
pg/L
1.9 J
0.25 J+
1.2 J+
1 J+
6.4
Cobalt
D
7440-48-4
NS
pg/L
1 UJ
0.5 U
0.19 J
0.16 J
0.18 J
Cobalt
T
7440-48-4
1
IMAC
pg/L
1 UJ
0.5 U
0.26 J
0.24 J+
0.95
Copper
D
7440-50-8
NS
pg/L
1 UJ
1 U
1 U
1.4
1 U
Copper
T
7440-50-8
1000
02L
pg/L
1 UJ
1 UJ
0.4 J
0.4 J
3.2 J+
Iron
D
7439-89-6
NS
pg/L
1160
700
146
330
2260
Iron
T
7439-89-6
300
02L
pg/L
2900
890
383 J+
690 J+
2760
Lead
D
7439-92-1
NS
pg/L
1 UJ
0.1 U
0.1 U
0.13
0.1 U
Lead
T
7439-92-1
15
02L
pg/L
1 UJ
0.1 UJ
0.14 J+
0.18
1.2
Magnesium
T
7439-95-4
NS
pg/L
11300
12300
8200
7900
9480
Manganese
D
7439-96-5
NS
pg/L
1100
1000
400
410
510
Manganese
T
7439-96-5
50
02L
pg/L
1140
1000
410
400 J+
500
Mercury
D
7439-97-6
NS
pg/L
0.05 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pg/L
0.05 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
pg/L
10 U
24.5 J+
10 U
5.1 J+
10.2 J+
Molybdenum
D
7439-98-7
NS
pg/L
1 UJ
0.13 J
1.2
0.71
1.5
Molybdenum
T
7439-98-7
NS
pg/L
1 UJ
0.16 J
1.3
0.69
2.1
Nickel
D
7440-02-0
NS
pg/L
1 UJ
0.33 J
2.4 J+
0.38 J
0.51 J+
Nickel
T
7440-02-0
100
02L
pg/L
1.59 J
0.28 J+
0.93 J+
0.68
4.8 J+
Potassium
T
7440-09-7
NS
pg/L
1810
5000 U
5000 U
5000 U
3420 J
Selenium
D
7782-49-2
NS
pg/L
1 UJ
0.5 U
0.32 J
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
1 UJ
0.5 U
0.39 J
0.5 U
0.33 J
Sodium
T
7440-23-5
NS
pg/L
15700
14500
10600
9730
17400
Strontium
D
7440-24-6
NS
pg/L
320
310
370
280
170
Strontium
T
7440-24-6
NS
pg/L
330
320
380
290
190
Thallium
D
7440-28-0
NS
pg/L
0.2 UJ
0.1 U
0.1 U
0.1 U
0.017 J
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.2 UJ
0.1 U
0.035 J
0.02 J
0.056 J
Vanadium
D
7440-62-2
NS
pg/L
0.3 UJ
1 U
1.5
0.4 J
0.39 J
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
1.88 J
1 U
1.8
0.81 J
3.7
Zinc
D
7440-66-6
NS
pg/L
12 J
10 U
10 U
13 J+
8.4 J
Zinc
T
7440-66-6
1000
02L
pg/L
7 J
10 UJ
3.7 J
3 J
16
Total Dissolved Solids
N
TDS
500000
02L
pg/L
250000
236000
210000
215000 J+
272000
Total Organic Carbon
N
TOC
NS
pg/L
523
610 J
540 J
1000 U
760 J
Total Suspended Solids
N
TSS
NS
pg/L
38000
5000 U
9100
18200
13000 J
Alkalinity, CO3
N
ALK-CO3
NS
pg/L
10000 U
5000 U
10000 U
5000 U
10000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
170000
160000
150000
108000
140000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
170000
160000
150000
108000
140000
Chloride
N
16887-00-6
250000
02L
pg/L
6800
6600
4400
4200
8300
Nitrite as N
N
14797-65-0
1000
02L
pg/L
10 UJ
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
25000
20600
3300
2400
14900
Sulfide
N
18496-25-8
NS
pg/L
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
0.593
As(V)
T
10103-60-3
NS
pg/L
0.2 U
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
0.008 J+
Fe(II)
T
1345-25-1
NS
pg/L
974
Fe(III)
T
1309-37-1
NS
pg/L
28300
Mn(II)
T
1344-43-0
NS
pg/L
1210
Mn(IV)
T
1313-13-9
NS
pg/L
6.46
Se(IV)
T
10102-18-8
NS
pg/L
0.5 U
Se(VI)
T
13410-01-0
NS
pg/L
0.5 U
Uranium, Natural
T
7440-61-1
NS
pg/L
Page 5 of 10

Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AS-8D
AS-8D
AS-8D
MW-301BR
MW-301BR
MW-303BR
MW-303BR
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (30-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
6/2/2015
6/26/2015
9/9/2015
6/11/2015
9/4/2015
6/12/2015
6/22/2015
N
N
N
N
N
N
N
AS-8D
AS-8D
DR-AS-8D-NS-3Q15
MW-301BR
DR-MW-301BR-NS-3Q15
MW-303BR
MW-303BR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
ug/I
Uranium-234
T
13966-29-5
NS
uq/I
Uranium-236
T
13982-70-2
NS
uq/1
Dissolved Oxygen
N
DO
NS
mq/L
0.35
0.26
0.51
0.27
Temp (Celcius)
N
TEMP
NS
Deg C
24.1
22.3
32.4
32.7
pH (field)
N
PH
6.5
8.5
02L
SU
6.83
6.62
6.9
6.56
Turbidity, field
N
TURB
--
NS
NTU
38.05
7.1
9.78
9.25
Spec. Cond. (field)
N
Sc
NS
PS/cm
411.6
371
337.6
282.8
Oxidation Reduction Potential
N
ORP
NS
my
38.5
-35.7
44
26.2
GW Depth (TOC)
N
JGW DEPTH_TOCI
NS
ft
38.65
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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 Januar,
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 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-303BR
MW-306BR
MW-306BR
MW-306BR
MW-315BR
MW-315BR
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
9/4/2015
6/12/2015
6/22/2015
9/4/2015
6/19/2015
9/8/2015
N
N
N
N
N
N
DR-MW-303BR-NS-3Q15
MW-306BR
MW-306BR
DR-MW-306BR-NS-3Q15
MW-315BR
DR-MW-315BR-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pg/L
100 U
7.9 J
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pg/L
660 J+
96.2 J-
600
790
100 U
Antimony
D
7440-36-0
NS
pg/L
0.36 J
0.43 J
0.5 U
0.29 J+
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
0.95
0.38 J
0.2 J
0.21 J
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
2.5
1.1
0.9
0.16 J
0.18 J
Arsenic
T
7440-38-2
10
02L
pg/L
4.5
1
1
0.19 J
0.33 J
Barium
D
7440-39-3
NS
pg/L
71
150
140
58
59
Barium
T
7440-39-3
700
02L
pg/L
94
150
160
71
22
Beryllium
D
7440-41-7
NS
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.095 J
0.2 U
0.2 U
0.2 U
0.16 J
Boron
D
7440-42-8
NS
pg/L
50 U
940
1500
50 U
50 U
Boron
T
7440-42-8
700
02L
pg/L
50 U
920
1700
50 U
50 U
Cadmium
D
7440-43-9
NS
pg/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pg/L
0.08 U
0.08 U
0.08 U
0.08 U
0.029 J
Calcium
T
7440-70-2
NS
pg/L
38600
91500
143000
40200
48400
Chromium
D
7440-47-3
NS
pg/L
0.28 J
0.31 J
0.29 J
0.32 J+
0.19 J
Chromium
T
7440-47-3
10
02L
pg/L
7.2
1.4 J+
3.2 J+
24.8
6
Cobalt
D
7440-48-4
NS
pg/L
0.13 J
0.45 J
1.2
1.2 J+
0.48 J
Cobalt
T
7440-48-4
1
IMAC
pg/L
0.46 J+
0.5 U
1.4
2.2
2.6
Copper
D
7440-50-8
NS
pg/L
5.5
1 U
0.8 J+
1 U
1 U
Copper
T
7440-50-8
1000
02L
pg/L
28.3
1 U
1.4 J+
2.4
5.2 J+
Iron
D
7439-89-6
NS
pg/L
2200
582
3100
86
39 J
Iron
T
7439-89-6
300
02L
pg/L
3400 J+
623 J
4000
1300
27 J
Lead
D
7439-92-1
NS
pg/L
0.28
0.1 U
0.065 J
0.1 U
0.11
Lead
T
7439-92-1
15
02L
pg/L
0.68
0.095 J
0.43
0.81
1.9
Magnesium
T
7439-95-4
NS
pg/L
12200
26600
57900
22600
14900
Manganese
D
7439-96-5
NS
pg/L
530
930
2200
1500
1100
Manganese
T
7439-96-5
50
02L
pg/L
590 J+
920
2400
1800
2.6 J+
Mercury
D
7439-97-6
NS
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
pg/L
13.4 J+
20.4 J+
10 UJ
10.9 J+
4.6 J+
Molybdenum
D
7439-98-7
NS
pg/L
2.1
2.3
4.5
0.36 J+
0.21 J
Molybdenum
T
7439-98-7
NS
pg/L
2.6
1.9
4.3
0.94
0.28 J
Nickel
D
7440-02-0
NS
pg/L
3
2 J+
3.5
1.2 J+
0.78
Nickel
T
7440-02-0
100
02L
pg/L
5
2.2 J+
4.1
16.1
5.3
Potassium
T
7440-09-7
NS
pg/L
3740 J
4290 J
2970 J
5000 U
5000 U
Selenium
D
7782-49-2
NS
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.2 J
0.5 U
0.22 J
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pg/L
19200
24200
32900
22100
15000
Strontium
D
7440-24-6
NS
pg/L
180
730
1200
420
460
Strontium
T
7440-24-6
NS
pg/L
210
740
1400
460
63
Thallium
D
7440-28-0
NS
pg/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.018 J
0.1 U
0.018 J
0.024 J
0.028 J
Vanadium
D
7440-62-2
NS
pg/L
0.28 J
1.5
1 U
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
2
1.6
1.6
1.4
5.5
Zinc
D
7440-66-6
NS
pg/L
9 J+
2.5 J
19 J+
130
2.8 J
Zinc
T
7440-66-6
1000
02L
pg/L
16
5 J
38
13
4.5 J
Total Dissolved Solids
N
TDS
500000
02L
pg/L
260000 J+
530000
778000 J+
277000
228000
Total Organic Carbon
N
TOC
NS
pg/L
580 J
900 J
530 J
810 J
1000 U
Total Suspended Solids
N
TSS
NS
pg/L
31200
6300 J
14100
222000
63600
Alkalinity, CO3
N
ALK-CO3
NS
pg/L
5000 U
10000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
145000
160000
190000
176000
148000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
145000
160000
190000 J-
176000
148000
Chloride
N
16887-00-6
250000
02L
pg/L
9700
21600
29700
10400
5600
Nitrite as N
N
14797-65-0
1000
02L
pg/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
20 U
20 U
20 UJ
20 U
20 UJ
Sulfate
N
14808-79-8
250000
02L
pg/L
16700
187000
345000
38400
39500
Sulfide
N
18496-25-8
NS
pg/L
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pg/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pg/L
Fe(III)
T
1309-37-1
NS
pg/L
Mn(II)
T
1344-43-0
NS
pg/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
NS
pg/L
Se(VI)
T
13410-01-0
NS
pg/L
Uranium, Natural
T
7440-61-1
NS
pg/L
Page 7 of 10

Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-303BR
MW-306BR
MW-306BR
MW-306BR
MW-315BR
MW-315BR
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
9/4/2015
6/12/2015
6/22/2015
9/4/2015
6/19/2015
9/8/2015
N
N
N
N
N
N
DR-MW-303BR-NS-3Q15
MW-306BR
MW-306BR
DR-MW-306BR-NS-3Q15
MW-315BR
DR-MW-315BR-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
ug/I
Uranium-234
T
13966-29-5
NS
uq/I
Uranium-236
T
13982-70-2
NS
uq/1
Dissolved Oxygen
N
DO
NS
mq/L
0.48
2.51
0.63
Temp (Celcius)
N
TEMP
NS
Deg C
29.4
19.5
30
pH (field)
N
PH
6.5
8.5
02L
SU
6.96
6.7
7.25
Turbidity, field
N
TURB
--
NS
NTU
8.39
13.34
21.23
Spec. Cond. (field)
N
SC
NS
PS/cm
727
368
385.3
Oxidation Reduction Potential
1 N
ORP
N
1
i my
3.3
-24.9
23
GW Depth (TOC)
I N
JGW DEPTH-TOC�--1
NS
I
I ft
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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 Januar,
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 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-317BR
MW-318D
MW-318D
OW-303D
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 2 (3Q-2015)
6/5/2015
6/2/2015
9/9/2015
9/12/2015
N
N
N
N
MW-317BR
MW-318D
DR-MW-318D-NS-3Q15
DR-OW-303D-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pg/L
520
21 J
100 U
100 U
Aluminum
T
7429-90-5
NS
pg/L
649
510
120
7400
Antimony
D
7440-36-0
NS
pg/L
1
1 UJ
0.5 U
2
Antimony
T
7440-36-0
1
IMAC
pg/L
2.1
1 UJ
0.5 U
2.9
Arsenic
D
7440-38-2
NS
pg/L
0.63
1 UJ
1
40.2
Arsenic
T
7440-38-2
10
02L
pg/L
0.71
1 UJ
0.93
55
Barium
D
7440-39-3
NS
pg/L
46
35 J
34
210
Barium
T
7440-39-3
700
02L
pg/L
58
41 J
37
320
Beryllium
D
7440-41-7
NS
pg/L
0.2 U
1 UJ
0.31
0.11 J
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.2 U
1 UJ
0.31
2.1
Boron
D
7440-42-8
NS
pg/L
50 U
1250
1300
1200
Boron
T
7440-42-8
700
02L
pg/L
44 J
1310
1300
1000
Cadmium
D
7440-43-9
NS
pg/L
0.08 U
1 UJ
0.068 J
0.44
Cadmium
T
7440-43-9
2
02L
pg/L
0.08 U
1 UJ
0.068 J
0.65
Calcium
T
7440-70-2
NS
pg/L
107000
21100
24900
52800 J-
Chromium
D
7440-47-3
NS
pg/L
8.4
1 UJ
0.38 J
0.27 J+
Chromium
T
7440-47-3
10
02L
pg/L
11
2.8 J
0.69 J+
15.1
Cobalt
D
7440-48-4
NS
pg/L
0.5 U
12.9 J
6.6
47.8
Cobalt
T
7440-48-4
1
IMAC
pg/L
0.5 U
13 J
6.7
53.2
Copper
D
7440-50-8
NS
pg/L
4.8 J+
1.38 J
2 J
1.4 J+
Copper
T
7440-50-8
1000
02L
pg/L
1.6 J+
9.7 J
0.56 J
37.6 J+
Iron
D
7439-89-6
NS
pg/L
50 U
588
490
9200
Iron
T
7439-89-6
300
02L
pg/L
128
1150
720
14900
Lead
D
7439-92-1
NS
pg/L
0.77
1 UJ
0.36
0.049 J+
Lead
T
7439-92-1
15
02L
pg/L
0.15
1 UJ
0.38
12.1
Magnesium
T
7439-95-4
NS
pg/L
670
12700
15400
26100
Manganese
D
7439-96-5
NS
pg/L
10 U
607
390
5000
Manganese
T
7439-96-5
50
02L
pg/L
8.7
577
430
4500
Mercury
D
7439-97-6
NS
pg/L
0.2 U
0.05 U
0.2 U
0.2 UJ
Mercury
T
7439-97-6
1
02L
pg/L
0.2 U
0.05 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
pg/L
20 U
10 U
9.3 J+
131
Molybdenum
D
7439-98-7
NS
pg/L
5.1
1 UJ
0.5 U
5.5
Molybdenum
T
7439-98-7
NS
pg/L
5.6
1 UJ
0.5 U
7.1
Nickel
D
7440-02-0
NS
pg/L
0.5 UJ
12.4 J
10.7
20.1
Nickel
T
7440-02-0
100
02L
pg/L
0.54 J+
15.1 J
11.3
31.4 J+
Potassium
T
7440-09-7
NS
pg/L
15600
1700
5000 U
9510
Selenium
D
7782-49-2
NS
pg/L
0.53
1 UJ
1.2
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.75
1.03 J
1
2.2
Sodium
T
7440-23-5
NS
pg/L
18700
35400
26500
35600
Strontium
D
7440-24-6
NS
pg/L
450
589
650
1800
Strontium
T
7440-24-6
NS
pg/L
570
604
650
1900
Thallium
D
7440-28-0
NS
pg/L
0.1 U
0.2 UJ
0.1 U
0.26
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 U
0.2 UJ
0.1 U
0.56
Vanadium
D
7440-62-2
NS
pg/L
8.5
0.3 UJ
1 U
0.91 J
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
8.4
0.654 J
1 U
36.5
Zinc
D
7440-66-6
NS
pg/L
10 U
78
34 J
2700
Zinc
T
7440-66-6
1000
02L
pg/L
10 UJ
71
25
3000
Total Dissolved Solids
N
TDS
500000
02L
pg/L
350000 J-
270000
257000
377000
Total Organic Carbon
N
TOC
NS
pg/L
1100
738
1200 J+
14900
Total Suspended Solids
N
TSS
NS
pg/L
14000 J-
9000
6200
1320000
Alkalinity, CO3
N
ALK-CO3
NS
pg/L
130000
10000 U
5000 U
145000 J+
Alkalinity, HCO3
N
ALK-HCO3
NS
pg/L
10000 U
83000
71000
98000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
270000
83000
71000
243000
Chloride
N
16887-00-6
250000
02L
pg/L
8000
9100
8800
29400
Nitrite as N
N
14797-65-0
1000
02L
pg/L
10 UJ
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
20 U
20 U
27
Sulfate
N
14808-79-8
250000
02L
pg/L
15500
91000
90500
42900
Sulfide
N
18496-25-8
NS
pg/L
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pg/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pg/L
Fe(III)
T
1309-37-1
NS
pg/L
Mn(II)
T
1344-43-0
NS
pg/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
NS
pg/L
Se(VI)
T
13410-01-0
NS
pg/L
Uranium, Natural
T
7440-61-1
NS
pg/L
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Page 9 of 10

Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-317BR
MW-318D
MW-318D
OW-303D
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 2 (3Q-2015)
6/5/2015
6/2/2015
9/9/2015
9/12/2015
N
N
N
N
MW-317BR
MW-318D
DR-MW-318D-NS-3Q15
DR-0W-303D-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
ug/I
Uranium-234
T
13966-29-5
NS
uq/I
Uranium-236
T
13982-70-2
NS
uq/1
Dissolved Oxygen
N
DO
NS
mq/L
1.38
1.5
0.22
Temp (Celcius)
N
TEMP
NS
Deg C
21.1
21.1
26.9
pH (field)
N
PH
6.5
8.5
02L
SU
11.44
5.51
5.23
Turbidity, field
N
TURB
--
NS
NTU
3.12
10.63
6.08
Spec. Cond. (field)
N
Sc
NS
pS/cm
1399
404
379.3
Oxidation Reduction Potential
N
ORP
NS
my
-29.3
241.9
194.5
GW Depth (TOC)
N
JGW DEPTH_TOCI
NS
ft
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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 Januar,
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
Dan River Steam Station Ash Basin
Page 10 of 10

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-10D
GWA-10D
GWA-10D
GWA-11D
GWA-11D
GWA-11S
GWA-14D
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
6/4/2015
6/26/2015
9/8/2015
6/5/2015
9/3/2015
6/10/2015
6/30/2015
N
N
N
N
N
N
N
GWA-10D
GWA-10D
DR-GWA-10D-NS-3Q15
GWA-11D
DR-GWA-I1D-NS-3Q15
GWA-11S
GWA-14D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
9
100 U
3.3 J
100 U
6.5 J
100 U
Aluminum
T
7429-90-5
NS
pg/L
6940
1100
425 J+
330
53
90 J
Antimony
D
7440-36-0
NS
pq/L
1 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
1 U
0.5 U
0.5 U
0.5 U
0.18 J
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
1 U
0.5 U
0.2 J
0.28 J
0.14 J
0.36 J
Arsenic
T
7440-38-2
10
02L
pg/L
1 U
0.4 J
0.25 J
0.39 J
0.18 J
0.38 J
Barium
D
7440-39-3
NS
pq/L
55
32
60
55
24
75
Barium
T
7440-39-3
700
02L
pq/L
136
65
64
63
25
78
Beryllium
D
7440-41-7
NS
pq/L
1 U
0.13 J
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
1 U
0.36
0.2 U
0.2 U
0.2 U
0.2 U
Boron
D
7440-42-8
NS
pq/L
172
300
50 U
50 U
100
250
Boron
T
7440-42-8
700
02L
pg/L
298
310
50 U
50 U
110
260
Cadmium
D
7440-43-9
NS
pq/L
1 U
0.033 J
0.08 U
0.08 U
0.039 J
0.08 U
Cadmium
T
7440-43-9
2
02L
pq/L
1 U
0.049 J
0.08 U
0.08 U
0.046 J
0.08 U
Calcium
T
7440-70-2
NS
pq/L
24200
19800
48000
55500
9730
66200
Chromium
D
7440-47-3
NS
pq/L
1 U
2.2
0.28 J+
2.3 J+
7.7
0.28 J
Chromium
T
7440-47-3
10
02L
pg/L
9.93
23.3
1.1 J+
22.2
15.6
0.27 J+
Cobalt
D
7440-48-4
NS
pq/L
2.11
0.71
1.2
1.4
2.9
0.2 J
Cobalt
T
7440-48-4
1
IMAC
pg/L
3.45
1.1
1.4
1.7
3.3
0.23 J
Copper
D
7440-50-8
NS
pq/L
7.79 J+
1.2
0.29 J+
4
0.28 J
0.28 J+
Copper
T
7440-50-8
1000
02L
pq/L
8.24
4.2 J+
0.57 J+
1.3
0.44 J
1 UJ
Iron
D
7439-89-6
NS
pq/L
146
64
1180
2200
134
50 U
Iron
T
7439-89-6
300
02L
pg/L
6040
1100
1700
3200
227
140
Lead
D
7439-92-1
NS
pq/L
1.04
0.16
0.1 U
0.41 J+
0.1 U
0.1 U
Lead
T
7439-92-1
15
02L
pq/L
9.42
2.3
0.26
0.24
0.11
0.1 U
Magnesium
T
7439-95-4
NS
pq/L
13100
13000
16600
20000
5140
7420
Manganese
D
7439-96-5
NS
pq/L
453
160
730
890
1200
290
Manganese
T
7439-96-5
50
02L
pg/L
509
130
810
980
1200
300
Mercury
D
7439-97-6
NS
pq/L
0.05 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pq/L
0.05 U
0.2 U
0.2 U
0.2 U
0.81 J+
0.2 U
Methane
N
74-82-8
NS
pq/L
10 U
1.6 J+
27
11.9 J+
13
62 J+
Molybdenum
D
7439-98-7
NS
pq/L
1 U
0.095 J
0.97
1.1
0.46 J
12.5
Molybdenum
T
7439-98-7
NS
pq/L
1 U
0.53
0.87
1.6
0.7 J+
13
Nickel
D
7440-02-0
NS
pq/L
6.43
8.8
1.1 J+
11.3
13.9
0.51
Nickel
T
7440-02-0
100
02L
pq/L
11.1
19.3
1.7 J+
20.5
17
0.46 J+
Potassium
T
7440-09-7
NS
pq/L
3210
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
7782-49-2
NS
pq/L
1 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
1 U
0.22 J
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pq/L
23400
17800
18100
19300
12500
21100
Strontium
D
7440-24-6
NS
pq/L
381
360
440
450
240
1700
Strontium
T
7440-24-6
NS
pq/L
481
430
480
500
240
1800
Thallium
D
7440-28-0
NS
pq/L
0.2 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.256
0.03 J
0.1 U
0.1 UJ
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pq/L
0.324
0.29 J
1 U
1 U
0.34 J
0.5 J
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
3.36
1.3
1.2 J+
0.45 J
0.52 J
0.67 J
Zinc
D
7440-66-6
NS
pq/L
13
45
11
3.7 J+
7.6 J
10 U
Zinc
T
7440-66-6
1000
02L
pg/L
43 J+
110
43 J+
6 J
2.7 J+
4.1 J
Total Dissolved Solids
N
TDS
500000
02L
pg/L
220000
208000
240000 J-
291000
10000 U
325000
Total Organic Carbon
N
TOC
NS
pq/L
1 459 J+
1100
930 J
1100
860 J
650 J
Total Suspended Solids
N
TSS
NS
pq/L
15000
14000
53000
3800
8600
6500
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
10000 U
5000 U
10000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pq/L
39000
39800
180000
187000
57000
132000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
39000
39800
180000
187000
57000
132000
Chloride
N
16887-00-6
250000
02L
pq/L
14000
11300
10900
10700
10000
13800
Nitrite as N
N
14797-65-0
1000
02L
pq/L
232
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
290
20 U
20 U
75
20 UJ
Sulfate
N
14808-79-8
250000
02L
pg/L
3300
72400
37100
37200
4400
88500
Sulfide
N
18496-25-8
NS
pq/L
4000 UJ
100 U
200 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pg/L
0.2 U
As(V)
T
10103-60-3
NS
pq/L
0.2 U
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
0.105
Fe(II)
T
1345-25-1
NS
pq/L
92
Fe(III)
T
1309-37-1
NS
pq/L
20 U
Mn(II)
T
1344-43-0
NS
pq/L
296
Mn(IV)
T
1313-13-9
NS
pg/L
1 UJ
Se(IV)
T
10102-18-8
NS
pq/L
0.091
S I)
T
13410-01-0
NS
pq/L
0.5 U
Uranium, Natural
T
7440-61-1
NS
pq/L
Page 1 of 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-10D
GWA-10D
GWA-10D
GWA-11D
GWA-11D
GWA-11S
GWA-14D
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
6/4/2015
6/26/2015
9/8/2015
6/5/2015
9/3/2015
6/10/2015
6/30/2015
N
N
N
N
N
N
N
GWA-10D
GWA-10D
DR-GWA-10D-NS-3Q15
GWA-11D
DR-GWA-I1D-NS-3Q15
GWA-11S
GWA-14D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
uq/L
Uranium-234
T
13966-29-5
NS
pq/L
Uranium-236
T
13982-70-2
NS
pq/L
Dissolved Oxygen
N
DO
NS
mg/L
1.15
1.08
0.47
4.74
0.58
Temp (Celcius)
N
TEMP
NS
Deg C
18.8
28.7
26.1
26.7
19
pH (field)
N
PH
6.5
8.5
02L
SU
5.82
5.4
6.71
5.83
7.34
Turbidity, field
N
TURB
--
NS
NTU
7.65
8.69
9.23
7.93
4.73
Spec. Cond. (field)
N
Sc
NS
PS/cm
319.5
303.3
429.8
165.1
807
Oxidation Reduction Potential
N
ORP
NS
my
140.8
208.3
26.3
246.9
-20.8
GW Depth (TOC)
N
JGW DEPTH-TOCI
NS
ft
33.79
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-14D
GWA-14S
GWA-14S
GWA-15D
GWA-15D
GWA-1D
GWA-1D
Round 2 (3Q-2015)
Round 2 (3Q-2015)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
9/9/2015
9/9/2015
9/11/2015
6/30/2015
9/10/2015
6/11/2015
9/8/2015
N
N
N
N
N
N
N
DR-GWA-14D-NS-3Q15
DR-GWA-I4S-NS-3Q15
DR-GWA-I4S-NS-3Q15
GWA-15D
DR-GWA-I5D-NS-3Q15
GWA-ID
DR-GWA-ID-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
100 U
100 U
74 J
100 U
4 J
100 U
Aluminum
T
7429-90-5
NS
pg/L
100 U
58 J
660
1000
413
60 J+
Antimony
D
7440-36-0
NS
pq/L
0.5 U
0.5 U
0.17 J
0.5 U
0.24 J
1.1
Antimony
T
7440-36-0
1
IMAC
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
0.31 J
1.3
Arsenic
D
7440-38-2
NS
pg/L
0.45 J
1.2
0.14 J
0.31 J
1
1.3
Arsenic
T
7440-38-2
10
02L
pg/L
0.45 J
1.2
0.18 J
0.32 J
1.2
1.4
Barium
D
7440-39-3
NS
pq/L
76
58
61
52
51
68
Barium
T
7440-39-3
700
02L
pq/L
5 U
47
67
59
62
79
Beryllium
D
7440-41-7
NS
pq/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.2 U
0.2 U
0.2 U
0.084 J
0.2 U
0.2 U
Boron
D
7440-42-8
NS
pq/L
260
49 J
79
73
50 U
50 U
Boron
T
7440-42-8
700
02L
pg/L
50 U
28 J
86
80
50 U
50 U
Cadmium
D
7440-43-9
NS
pq/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pq/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pq/L
71600
10600
140000
126000
54300
34000
Chromium
D
7440-47-3
NS
pq/L
0.32 J
0.34 J
0.38 J
0.19 J
0.73
0.23 J
Chromium
T
7440-47-3
10
02L
pg/L
0.66 J+
13.6
1.2 J+
1.8
1.6 J+
0.31 J
Cobalt
D
7440-48-4
NS
pq/L
0.18 J
7.3
0.14 J
0.5 U
0.5 U
0.5 U
Cobalt
T
7440-48-4
1
IMAC
pg/L
0.32 J
3.5
0.24 J
0.61
0.3 J
0.5 U
Copper
D
7440-50-8
NS
pq/L
0.64 J
1 U
11
0.67 J
1 U
1 U
Copper
T
7440-50-8
1000
02L
pq/L
0.25 J+
0.69 J+
0.76 J+
1.8
1.1 J+
1 UJ
Iron
D
7439-89-6
NS
pq/L
85
4900
26 J
50 U
136
50 U
Iron
T
7439-89-6
300
02L
pg/L
50 U
3200
840
980
719
69 J+
Lead
D
7439-92-1
NS
pq/L
0.11
0.1 U
0.1 U
0.12
0.1 U
0.1 U
Lead
T
7439-92-1
15
02L
pq/L
0.14
0.1
0.33 J+
1.3
0.29 J+
0.1 U
Magnesium
T
7439-95-4
NS
pq/L
7570
6040
18900
18400
5610
4210
Manganese
D
7439-96-5
NS
pq/L
330
7600
260
220
600
300
Manganese
T
7439-96-5
50
02L
pg/L
5 UJ
2300
270
220
680
300 J+
Mercury
D
7439-97-6
NS
pq/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pq/L
0.2 U
0.2 U
0.2 U
0.087 J
0.2 U
0.2 U
Methane
N
74-82-8
NS
pq/L
338
8.6 J+
3.9 J+
5.2 J+
1 o U
10.4 J+
Molybdenum
D
7439-98-7
NS
pq/L
13.3
2
0.93
1
2.6
3.9
Molybdenum
T
7439-98-7
NS
pq/L
12.9
0.58
0.89
0.78
2.7
4.5
Nickel
D
7440-02-0
NS
pq/L
0.56
2.9
0.91
0.67
0.62 J+
0.5 U
Nickel
T
7440-02-0
100
02L
pq/L
0.63 J+
10.9
1.1 J+
1.8
1.1 J+
0.2 J+
Potassium
T
7440-09-7
NS
pq/L
5000 U
2990 J
5270
7580
6280
29700
Selenium
D
7782-49-2
NS
pq/L
0.5 U
0.5 U
0.22 J
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
0.5 U
0.24 J
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pq/L
21200
14200
26700
29800
10500
15500
Strontium
D
7440-24-6
NS
pq/L
1800
200
3300
3200
260
260
Strontium
T
7440-24-6
NS
pq/L
5 U
110
3300
2800
310
310
Thallium
D
7440-28-0
NS
pq/L
0.1 U
0.1 U
0.1 U
0.1 U
0,045 J
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 U
0.1 U
0.1 U
0.024 J
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pq/L
1 U
1 U
0.86 J
1.2
1 U
0.38 J
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
0.62 J
0.48 J
1.5
3.2
0.79 J
0.45 J
Zinc
D
7440-66-6
NS
pq/L
14
13
18
7.4 J
10 U
10 U
Zinc
T
7440-66-6
1000
02L
pg/L
4.3 J
5.6 J
3.8 J
4.1 J
4.8 J
10 U
Total Dissolved Solids
N
TDS
500000
02L
pg/L
335000
218000
705000
618000
220000
198000
Total Organic Carbon
N
TOC
NS
pq/L
1000 U
1500
540 J
560 J
1000 U
690 J
Total Suspended Solids
N
TSS
NS
pq/L
46900
4900
42900
13400
33000
2500 U
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
5000 U
5000 U
5000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pq/L
130000
77900
129000
94500
160000
126000
Alkalinity, lab
N
ALK-LAB
NS
pq/L
130000
77900
129000
94500
160000
126000
Chloride
N
16887-00-6
250000
02L
pq/L
13100
7500
13300
12700
1500
1700
Nitrite as N
N
14797-65-0
1000
02L
pq/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
20 U
20 U
20 UJ
21
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
90800
25700
307000
301000
4200
5400
Sulfide
N
18496-25-8
NS
pq/L
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pq/L
As(V)
T
10103-60-3
NS
pq/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pq/L
Fe(III)
T
1309-37-1
NS
pq/L
Mn(II)
T
1344-43-0
NS
pq/L
Mn(IV)
T
1313-13-9
NS
pq/L
Se(IV)
T
10102-18-8
NS
pq/L
Se(VI)
T
13410-01-0
NS
pq/L
Uranium, Natural
T
7440-61-1
NS
pq/L
Page 3 of 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-14D
GWA-14S
GWA-14S
GWA-15D
GWA-15D
GWA-1D
GWA-1D
Round 2 (3Q-2015)
Round 2 (3Q-2015)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
9/9/2015
9/9/2015
9/11/2015
6/30/2015
9/10/2015
6/11/2015
9/8/2015
N
N
N
N
N
N
N
DR-GWA-14D-NS-3Q15
DR-GWA-I4S-NS-3Q15
DR-GWA-I4S-NS-3Q15
GWA-15D
DR-GWA-I5D-NS-3Q15
GWAAD
DR-GWA-ID-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
uq/L
Uranium-234
T
13966-29-5
NS
pq/L
Uranium-236
T
13982-70-2
NS
uq/L
Dissolved Oxygen
N
DO
NS
mg/L
0.18
1.75
0.71
0.3
0.54
0.3
Temp (Celcius)
N
TEMP
NS
Deg C
29.9
26
20.6
21.2
19.7
18.7
pH (field)
N
PH
6.5
8.5
02L
SU
7.1
5.9
7.09
6.8
7.5
9.1
Turbidity, field
N
TURB
--
NS
NTU
3.17
2.92
4.52
8.9
18.83
8.2
Spec. Cond. (field)
N
Sc
NS
PS/cm
508
173.7
1576
873
389.2
287.9
Oxidation Reduction Potential
N
ORP
NS
my
-45.5
61.4
156
84.8
-4.1
-78.8
GW Depth (TOC)
N
JGW DEPTH-TOCI
NS
ft
6.32
9.8
23.34
33.05
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWAAS
GWAAS
GWA-2D
GWA-2D
GWA-2S
GWA-2S
GWA-3D
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
6/17/2015
9/9/2015
6/10/2015
9/8/2015
6/11/2015
9/4/2015
6/4/2015
N
N
N
N
N
N
N
GWAAS
DR-GWA-1S-NS-3Q15
GWA-2D
DR-GWA-2D-NS-3Q15
GWA-2S
DR-GWA-2S-NS-3Q15
GWA-3D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
100 U
100 U
5.8 J
100 U
3.4 J
100 U
9
Aluminum
T
7429-90-5
NS
pg/L
920
110
90.9
310
806
1100 J+
350
Antimony
D
7440-36-0
NS
pq/L
0.37 J
0.9
0.55
0.25 J
0.5 U
1 U
Antimony
T
7440-36-0
1
IMAC
pg/L
0.5 UJ
0.95
2.2
0.55
0.5 U
0.5 U
1 U
Arsenic
D
7440-38-2
NS
pg/L
0.5 U
0.5 U
1.1
1.5
0.5 U
1 U
Arsenic
T
7440-38-2
10
02L
pg/L
0.18 J
0.5 U
1.3
1.7
0.14 J
0.39 J
1 U
Barium
D
7440-39-3
NS
pq/L
6.2
7.7
40
41
18
17
9
Barium
T
7440-39-3
700
02L
pq/L
12
8.6
56
46
26
27
13
Beryllium
D
7440-41-7
NS
pq/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.094 J
0.2 U
0.2 U
0.2 U
0.078 J
0.13 J
1 U
Boron
D
7440-42-8
NS
pq/L
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Boron
T
7440-42-8
700
02L
pg/L
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Cadmium
D
7440-43-9
NS
pq/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
Cadmium
T
7440-43-9
2
02L
pq/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
Calcium
T
7440-70-2
NS
pq/L
3450
2320
58200
43200
2690
2940
10800
Chromium
D
7440-47-3
NS
pq/L
2.2 J+
0.48 J
4.3
3.7
1.1
12.3
Chromium
T
7440-47-3
10
02L
pg/L
13.8
1.6 J+
5.7
6.3
2.6
4.7
17.7
Cobalt
D
7440-48-4
NS
pq/L
2.4
1.5
0.5 U
0.5 U
1.9
1 U
Cobalt
T
7440-48-4
1
IMAC
pg/L
3
1.5
0.5 U
0.3 J
2.3
1.4 J+
1.02
Copper
D
7440-50-8
NS
pq/L
0.76 J+
2.4
0.49 J
6.4
0.31 J+
1.03 J+
Copper
T
7440-50-8
1000
02L
pq/L
3 J+
0.5 J
0.54 J
0.86 J+
0.92 J
2.3
2.99
Iron
D
7439-89-6
NS
pq/L
50 U
50 U
50 U
50 U
50 U
120
101
Iron
T
7439-89-6
300
02L
pg/L
1200
170
86.7
230
909
1600 J+
411
Lead
D
7439-92-1
NS
pq/L
0.1 U
0.27
0.1 U
0.86
0.1 U
1 U
Lead
T
7439-92-1
15
02L
pq/L
0.51
0.069 J
0.23
0.34
0.4 J+
1.2
1.5
Magnesium
T
7439-95-4
NS
pq/L
3470
1790
3860
6700
1290
1190
8090
Manganese
D
7439-96-5
NS
pq/L
100
71
5 U
280
88
81
107
Manganese
T
7439-96-5
50
02L
pg/L
120
74
25
280
94
46 J+
122
Mercury
D
7439-97-6
NS
pq/L
0.2 UJ
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.05 U
Mercury
T
7439-97-6
1
02L
pq/L
0.11 J+
0.2 U
0.79 J+
0.2 U
0.2 U
0.2 U
0.05 U
Methane
N
74-82-8
NS
pq/L
10 U
2.1 J+
10 U
3.6 J+
10 U
2.5 J+
10 U
Molybdenum
D
7439-98-7
NS
pq/L
0.11 J
0.5 U
3.3
1.7
0.12 J
1.01
Molybdenum
T
7439-98-7
NS
pq/L
0.3 J
0.14 J
3.9
2.2
0.11 J
0.19 J
1.28
Nickel
D
7440-02-0
NS
pq/L
8.2
2.1
0.31 J
0.46 J
3.8
12.5
Nickel
T
7440-02-0
100
02L
pq/L
10.3
2.3
0.47 J
1.2 J+
4.5 J+
4.3
16.9
Potassium
T
7440-09-7
NS
pq/L
5000 U
5000 U
5560
5000 U
5000 U
5000 U
796
Selenium
D
7782-49-2
NS
pq/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Sodium
T
7440-23-5
NS
pq/L
18400
15000
11400
9490
3750 J
3390 J
24900
Strontium
D
7440-24-6
NS
pq/L
53
35
210
260
25
23
155
Strontium
T
7440-24-6
NS
pq/L
59
36
250
270
26
24
162
Thallium
D
7440-28-0
NS
pq/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.2 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.016 J
0.1 U
0.032 J
0.1 U
0.016 J
0.031 J
0.2 U
Vanadium
D
7440-62-2
NS
pq/L
1 U
1 U
0.5 J
0.33 J
1 U
0.3 U
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
1.5
0.39 J
0.57 J
0.65 J
1.3
4.1
0.3 U
Zinc
D
7440-66-6
NS
pq/L
3.5 J
22
10 U
10 U
6.6 J
9.1 J+
19
Zinc
T
7440-66-6
1000
02L
pg/L
9.6 J+
27
3.1 J+
2.8 J
8.7 J
7 J
16 J+
Total Dissolved Solids
N
TDS
500000
02L
pg/L
105000
56000 J
10000 U
198000
37000
96000 J+
160000
Total Organic Carbon
N
TOC
NS
pq/L
1900
1100
780 J
520 J
9300
960 J
412 J+
Total Suspended Solids
N
TSS
NS
pq/L
25000
2700
200000
97200
17000
58000
15000
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
10000 U
5000 U
18000
5000 U
10000 U
5000 U
10000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pq/L
37000
18700
29000
128000
16000
13600
75000
Alkalinity, lab
N
ALK-LAB
NS
pg/L
37000
18700
51000
128000
16000
13600
75000
Chloride
N
16887-00-6
250000
02L
pq/L
3600 J+
4200
5000
4100
1800
1700
22000
Nitrite as N
N
14797-65-0
1000
02L
pq/L
57
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
20 U
37
34
20 UJ
160 J+
190
Sulfate
N
14808-79-8
250000
02L
pg/L
15100 J+
15100
3100
3700
640 J
1000
6200
Sulfide
N
18496-25-8
NS
pq/L
200 U
100 U
100 U
100 U
100 U
100 U
500 U
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pq/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pq/L
Fe(III)
T
1309-37-1
NS
pq/L
Mn(II)
T
1344-43-0
NS
pq/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
NS
pq/L
Se(VI)
T
13410-01-0
NS
pq/L
Uranium, Natural
T
7440-61-1
NS
pq/L
Page 5 of 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWAAS
GWAAS
GWA-2D
GWA-2D
GWA-2S
GWA-2S
GWA-3D
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
6/17/2015
9/9/2015
6/10/2015
9/8/2015
6/11/2015
9/4/2015
6/4/2015
N
N
N
N
N
N
N
GWAAS
DR-GWA-1S-NS-3Q15
GWA-2D
DR-GWA-2D-NS-3Q15
GWA-2S
DR-GWA-2S-NS-3Q15
GWA-3D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
uq/L
Uranium-234
T
13966-29-5
NS
pq/L
Uranium-236
T
13982-70-2
NS
uq/L
Dissolved Oxygen
N
DO
NS
mg/L
49.6
2.9
1
0.33
3.8
2.7
Temp (Celcius)
N
TEMP
NS
Deg C
23.8
19.7
31.9
28.5
35.9
18.5
pH (field)
N
PH
6.5
8.5
02L
SU
5.97
5.7
8.98
7.44
5.74
5.7
Turbidity, field
N
TURB
--
NS
NTU
26.12
9.7
26.09
14.98
8.13
7.58
Spec. Cond. (field)
N
Sc
NS
PS/cm
105
111.2
187.2
346.5
50.1
244.7
Oxidation Reduction Potential
N
ORP
NS
my
296.6
5.6
177
120.5
293.4
246.2
GW Depth (TOC)
N
JGW DEPTH-TOCI
NS
ft
32.9
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-3D
GWA-3S
GWA-3S
GWA-4D
GWA-4D
GWA-4S
GWA-4S
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
9/4/2015
6/4/2015
9/4/2015
6/23/2015
9/9/2015
6/19/2015
9/10/2015
N
N
N
N
N
N
N
DR-GWA-3D-NS-3Q15
GWA-3S
DR-GWA-3S-NS-3Q15
GWA-4D
DR-GWA-4D-NS-3Q15
GWA-4S
DR-GWA-4S-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
100 U
17
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pg/L
170
236
190 J+
430
360
380
1700
Antimony
D
7440-36-0
NS
pq/L
0.5 J
1 U
0.5 U
0.23 J
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
0.66
1 U
0.5 U
0.49 J
0.5 U
0.5 U
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
0.5 U
1 U
0.5 U
0.39 J
0.2 J
0.18 J
0.23 J
Arsenic
T
7440-38-2
10
02L
pg/L
0.16 J
1 U
0.11 J
0.37 J
0.5 U
0.2 J
0.39 J
Barium
D
7440-39-3
NS
pq/L
6
45
38
20
26
27
39
Barium
T
7440-39-3
700
02L
pq/L
9.3
49
34
26
31
32
60
Beryllium
D
7440-41-7
NS
pq/L
0.2 U
1 U
0.2
0.1 J
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.069 J
1 U
0.1 J
0.2 U
0.2 U
0.2 U
0.16 J
Boron
D
7440-42-8
NS
pq/L
27 J
50 U
50 U
240
250
200 J+
250
Boron
T
7440-42-8
700
02L
pg/L
26 J
50 U
50 U
250
250
190
250
Cadmium
D
7440-43-9
NS
pq/L
0.062 J
1 U
0.037 J
0.032 J
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
pq/L
0.08
1 U
0.039 J
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pq/L
11000
5830
2050
26500
20900
19500
19300
Chromium
D
7440-47-3
NS
pq/L
17.4
1 U
1.1
0.53
0.36 J
0.81
7
Chromium
T
7440-47-3
10
02L
pg/L
39.7
1 U
4.2
1.2 J+
1.1 J+
3.2
35.2
Cobalt
D
7440-48-4
NS
pq/L
0.91
11.3
17.6
0.17 J
0.29 J
2.7
2.5
Cobalt
T
7440-48-4
1
IMAC
pg/L
1.1
12.2
10.8
0.35 J
0.54
2.7
3.8
Copper
D
7440-50-8
NS
pq/L
2.6 J+
1 UJ
3.2
0.41 J
1 J
1 U
0.67 J
Copper
T
7440-50-8
1000
02L
pq/L
1.8 J+
8.6
1.1
1.4 J+
0.44 J
0.58 J
3.7
Iron
D
7439-89-6
NS
pq/L
220
14
50 U
50 U
29 J
50 U
150
Iron
T
7439-89-6
300
02L
pg/L
460
190
220 J+
370 J+
330
530
2400
Lead
D
7439-92-1
NS
pq/L
0.27
1 U
0.28
0.1 U
0.12
0.1 U
0.067 J
Lead
T
7439-92-1
15
02L
pq/L
0.8
1 U
0.2
0.45 J+
0.53
0.29
1.7
Magnesium
T
7439-95-4
NS
pq/L
9140
4990
1920
6890
7530
5970
5940
Manganese
D
7439-96-5
NS
pq/L
76
480
380
23
70
560
510
Manganese
T
7439-96-5
50
02L
pg/L
89
533
300 J+
33
90
590
540
Mercury
D
7439-97-6
NS
pq/L
0.2 U
0.05 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pq/L
0.2 U
0.05 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
pq/L
2 J+
10 U
1.8 J+
12.7 J+
115
82
529
Molybdenum
D
7439-98-7
NS
pq/L
0.56
1 U
0.5 U
0.54 J+
0.15 J
11.9
12.8
Molybdenum
T
7439-98-7
NS
pq/L
1.2
1 U
0.5 U
0.64
0.15 J
11.6
15.2
Nickel
D
7440-02-0
NS
pq/L
28.4
8.27
9
0.68
0.94
4.5
21
Nickel
T
7440-02-0
100
02L
pq/L
34.4
8.7
9
0.91 J+
1.3
4.5
23.4
Potassium
T
7440-09-7
NS
pq/L
5000 U
2570
2700 J
5000 U
5000 U
4320 J
4390 J
Selenium
D
7782-49-2
NS
pq/L
0.5 U
1 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
1 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pq/L
21100
11300
7040
17400
18600
17200
16600
Strontium
D
7440-24-6
NS
pq/L
160
84
53
310
290
290
340
Strontium
T
7440-24-6
NS
pq/L
180
108
42
340
280
300
330
Thallium
D
7440-28-0
NS
pq/L
0.1 U
0.2 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 U
0.2 U
0.1 U
0.1 U
0.1 U
0.1 U
0.044 J
Vanadium
D
7440-62-2
NS
pq/L
1 U
0.3 U
1 U
0.95 J
1 U
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
0.6 J
0.3 U
0.56 J
1.5
0.53 J
0.6 J
4.3
Zinc
D
7440-66-6
NS
pq/L
29
27
21 J+
10 U
9.8 J
2.6 J
4.6 J
Zinc
T
7440-66-6
1000
02L
pg/L
20
20 J+
11
5.9 J+
3.1 J
3.4 J
8.5 J
Total Dissolved Solids
N
TDS
500000
02L
pg/L
196000 J+
110000
83000 J+
188000
171000
152000
157000
Total Organic Carbon
N
TOC
NS
pq/L
1000 U
588 J+
2000 U
14000
1000 UJ
650 J
1000 U
Total Suspended Solids
N
TSS
NS
pq/L
24400
5000 U
2700 U
102000
63000
68100
601000
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
5000 U
10000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pq/L
73000
67000
19900
64700
47200
58800
63500
Alkalinity, lab
N
ALK-LAB
NS
pg/L
73000 J-
67000
19900
64700
47200
58800
63500
Chloride
N
16887-00-6
250000
02L
pq/L
21700
11000
4500
14200
13300
11400
11100
Nitrite as N
N
14797-65-0
1000
02L
pq/L
31
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
62 J-
30
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
3900
73000
1800
47800
42700
38200
28700
Sulfide
N
18496-25-8
NS
pq/L
100 U
100 U
100 U
100 U
100 U
100 U
100 UJ
As(III)
T
7784-46-5
NS
pg/L
As(V)
T
10103-60-3
NS
pq/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pq/L
Fe(III)
T
1309-37-1
NS
pq/L
Mn(II)
T
1344-43-0
NS
pq/L
Mn(IV)
T
1313-13-9
NS
pg/L
Se(IV)
T
10102-18-8
NS
pq/L
Se(VI)
T
13410-01-0
NS
pq/L
Uranium, Natural
T
7440-61-1
NS
pq/L
Page 7 of 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-3D
GWA-3S
GWA-3S
GWA-4D
GWA-4D
GWA-4S
GWA-4S
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
9/4/2015
6/4/2015
9/4/2015
6/23/2015
9/9/2015
6/19/2015
9/10/2015
N
N
N
N
N
N
N
DR-GWA-3D-NS-3Q15
GWA-3S
DR-GWA-3S-NS-3Q15
GWA-4D
DR-GWA-4D-NS-3Q15
GWA-4S
DR-GWA-4S-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
uq/L
Uranium-234
T
13966-29-5
NS
pq/L
Uranium-236
T
13982-70-2
NS
uq/L
Dissolved Oxygen
N
DO
NS
mg/L
5.47
1.49
0.18
0.51
Temp (Celcius)
N
TEMP
NS
Deg C
19.1
22.6
27.1
23.9
pH (field)
N
PH
6.5
8.5
02L
SU
5.51
6.9
6.3
6.39
Turbidity, field
N
TURB
--
NS
NTU
7A2
7.01
14.6
35.84
Spec. Cond. (field)
N
Sc
NS
PS/cm
141.7
281.9
256.9
189.6
Oxidation Reduction Potential
N
ORP
NS
my
303.7
180.6
51.9
60.8
GW Depth (TOC)
N
JGW DEPTH-TOCI
NS
ft
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-5BR
GWA-5BR
GWA-6D
GWA-6D
GWA-6S
GWA-6S
MW-21D
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
6/16/2015
9/9/2015
6/29/2015
9/11/2015
6/30/2015
9/12/2015
6/23/2015
N
N
N
N
N
N
N
GWA-5BR
DR-GWA-5BR-NS-3Q15
GWA-6D
DR-GWA-6D-NS-3Q15
GWA-6S
DR-GWA-6S-NS-3Q15
MW-21D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
5.8 J
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pg/L
187
65 J
120
100 U
1300
220
100 U
Antimony
D
7440-36-0
NS
pq/L
0.5 U
0.5 U
0.5 U
0.17 J
2.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
pg/L
0.5 U
0.5 U
0.5 U
0.18 J
2.5 U
0.5 U
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
0.85
0.31 J
0.98
0.96
2.4 J
3.1
0.41 J+
Arsenic
T
7440-38-2
10
02L
pg/L
0.83
0.19 J
0.96
0.79
2.2 J
2.9
0.21 J
Barium
D
7440-39-3
NS
pq/L
73
64
33
42
200
210
34
Barium
T
7440-39-3
700
02L
pq/L
75
65
35
43
210
220
42
Beryllium
D
7440-41-7
NS
pq/L
0.2 U
0.2 U
0.2 U
0.2 U
1 U
0.2 U
0.33
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
1 U
0.2 U
0.2 U
Boron
D
7440-42-8
NS
pq/L
190
190
630
620
620
710
210
Boron
T
7440-42-8
700
02L
pg/L
190 J+
190
610
600
610
700
210
Cadmium
D
7440-43-9
NS
pq/L
0.08 U
0.08 U
0.08 U
0.08 U
0.4 U
0.08 U
0.07 J
Cadmium
T
7440-43-9
2
02L
pq/L
0.08 U
0.08 U
0.08 U
0.08 U
0.4 U
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pq/L
188000
174000
50500
45500
81100
83000
136000
Chromium
D
7440-47-3
NS
pq/L
0.27 J+
0.52
0.22 J
0.42 J
0.9 J
0.45 J
0.39 J+
Chromium
T
7440-47-3
10
02L
pg/L
0.5 UJ
0.7 J+
1.1 J+
0.68 J+
3.6
0.75 J+
0.31 J+
Cobalt
D
7440-48-4
NS
pq/L
0.26 J
0.5 U
0.45 J
0.54
2.5 U
1.6
0.5 U
Cobalt
T
7440-48-4
1
IMAC
pg/L
0.32 J
0.5 U
0.51
0.51
1.3 J
1.8
0.5 U
Copper
D
7440-50-8
NS
pq/L
1 UJ
1 U
0.32 J
0.64 J
5 U
0.29 J
4.5 J+
Copper
T
7440-50-8
1000
02L
pq/L
1 UJ
1 U
1 UJ
1 U
3.2 J
0.39 J
1.5 J+
Iron
D
7439-89-6
NS
pq/L
210
190
7400
6700
25300
13600
690
Iron
T
7439-89-6
300
02L
pg/L
307
260
7400
6700
21200
15200
550
Lead
D
7439-92-1
NS
pq/L
0.1 UJ
0.1 U
0.1 U
0.15
0.5 U
0.1 U
0.73 J+
Lead
T
7439-92-1
15
02L
pq/L
0.098 J+
0.1 U
0.18 J+
0.073 J
1.7
0.077 J
0.76
Magnesium
T
7439-95-4
NS
pq/L
25900
27900
10400
10900
14100
12500
19100
Manganese
D
7439-96-5
NS
pq/L
620
630
1300
1200
3900
3700
940
Manganese
T
7439-96-5
50
02L
pg/L
630
650
1300
1200
3700
3800
920
Mercury
D
7439-97-6
NS
pq/L
0.2 UJ
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pq/L
0.2 UJ
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
pq/L
17
16.9 J+
3080
2920
744 J
2740
16.9 J+
Molybdenum
D
7439-98-7
NS
pq/L
0.44 J
0.22 J
3.3
5.4
13.7
8.6
0.34 J+
Molybdenum
T
7439-98-7
NS
pq/L
0.55
0.23 J
3
5.2
9.2
8
0.31 J
Nickel
D
7440-02-0
NS
pq/L
1 J+
0.82
2.2
2
1.4 J
1.8
0.75 J+
Nickel
T
7440-02-0
100
02L
pq/L
1.1 J+
0.85
2.1 J+
1.9
2.9
1.9
0.58 J+
Potassium
T
7440-09-7
NS
pq/L
5000 U
5000 U
5000 U
5000 U
12000
10700
5000 U
Selenium
D
7782-49-2
NS
pq/L
0.5 U
0.5 U
0.5 U
0.5 U
2.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
2.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pq/L
29600
21000
28200
27000
24700
26200
15800
Strontium
D
7440-24-6
NS
pq/L
2300
2100
190
190
860
680
810
Strontium
T
7440-24-6
NS
pq/L
2300
2100
200
200
850
710
960
Thallium
D
7440-28-0
NS
pq/L
0.1 UJ
0.1 U
0.1 U
0.1 U
0.14 J
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 UJ
0.1 U
0.1 U
0.1 UJ
0.5 U
0.1 UJ
0.1 U
Vanadium
D
7440-62-2
NS
pq/L
1 U
1 U
1 U
1 U
5 U
1.2
1 U
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
0.49 J
1 U
1 U
1 U
6.5
1.1
1 U
Zinc
D
7440-66-6
NS
pq/L
23
6.6 J
10 U
5.7 J
2.7 J
13
32 J+
Zinc
T
7440-66-6
1000
02L
pg/L
6.6 J
10 U
10 UJ
6.4 J
27 J+
4.8 J
10 U
Total Dissolved Solids
N
TDS
500000
02L
pg/L
873000
799000
302000
293000
432000
340000
639000
Total Organic Carbon
N
TOC
NS
pq/L
26800
1000 UJ
1400
23200
34800
7800
1000 U
Total Suspended Solids
N
TSS
NS
pq/L
10700
2900
15000
6200
67000
371000
3500
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
10000 U
5000 U
5000 U
5000 U
5000 U
5000 UJ
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pq/L
150000
154000
124000
92100
290000
317000
161000
Alkalinity, lab
N
ALK-LAB
NS
pq/L
150000
154000
124000 J+
92100
290000
317000
161000
Chloride
N
16887-00-6
250000
02L
pq/L
17500
18200
16300
18300
18500
18900
17700
Nitrite as N
N
14797-65-0
1000
02L
pq/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
20 U
20 U
22 J+
20 UJ
20 U
16 J-
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
416000
362000
88700
97700
10900
2300
274000
Sulfide
N
18496-25-8
NS
pq/L
100 U
100 U
100 UJ
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pq/L
As(V)
T
10103-60-3
NS
pq/L
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
Fe(II)
T
1345-25-1
NS
pq/L
Fe(III)
T
1309-37-1
NS
pq/L
Mn(II)
T
1344-43-0
NS
pq/L
Mn(IV)
T
1313-13-9
NS
pq/L
Se(IV)
T
10102-18-8
NS
pq/L
Se(VI)
T
13410-01-0
NS
pq/L
Uranium, Natural
T
7440-61-1
NS
pq/L
Page 9 of 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-5BR
GWA-5BR
GWA-6D
GWA-6D
GWA-6S
GWA-6S
MW-21D
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
6/16/2015
9/9/2015
6/29/2015
9/11/2015
6/30/2015
9/12/2015
6/23/2015
N
N
N
N
N
N
N
GWA-5BR
DR-GWA-5BR-NS-3Q15
GWA-6D
DR-GWA-6D-NS-3Q15
GWA-6S
DR-GWA-6S-NS-3Q15
MW-21D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
uq/L
Uranium-234
T
13966-29-5
NS
pq/L
Uranium-236
T
13982-70-2
NS
uq/L
Dissolved Oxygen
N
DO
NS
mg/L
0.42
0.35
18
0.3
0.2
0.34
Temp (Celcius)
N
TEMP
NS
Deg C
23.7
22.4
18.6
20.5
21.1
23.4
pH (field)
N
PH
6.5
8.5
02L
SU
6.99
7.08
6.58
6.5
6.8
7.03
Turbidity, field
N
TURB
--
NS
NTU
3.75
0.55
5.61
5.5
140.2
8.22
Spec. Cond. (field)
N
Sc
NS
PS/cm
1074
1074
460
446.6
687
855
Oxidation Reduction Potential
N
ORP
NS
my
47.2
-76
4.6
-34.7
-92.1
87.5
GW Depth (TOC)
N
JGW DEPTH-TOCI
NS
ft
18.85
19.7
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-21D
MW-21D
MW-21S
MW-21S
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
6/24/2015
9/10/2015
6/24/2015
9/10/2015
N
N
N
N
MW-21D
DR-MW-2ID-NS-3Q15
MW-21S
DR-MW-21S-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
pq/L
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pg/L
250
100 U
94 J
Antimony
D
7440-36-0
NS
pq/L
0.5 U
0.3 J
0.18 J
Antimony
T
7440-36-0
1
IMAC
pg/L
0.5 U
0.29 J
0.5 U
Arsenic
D
7440-38-2
NS
pg/L
0.12 J
16.9
34.2
Arsenic
T
7440-38-2
10
02L
pg/L
0.17 J
16.8
42.8
Barium
D
7440-39-3
NS
pq/L
38
33
40
Barium
T
7440-39-3
700
02L
pq/L
40
38
45
Beryllium
D
7440-41-7
NS
pq/L
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
pg/L
0.2 U
0.2 U
0.2 U
Boron
D
7440-42-8
NS
pq/L
210
180
250
Boron
T
7440-42-8
700
02L
pg/L
210
190
260
Cadmium
D
7440-43-9
NS
pq/L
0.08 U
0.03 J
0.08 U
Cadmium
T
7440-43-9
2
02L
pq/L
0.08 U
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
pq/L
144000
22000
23400
Chromium
D
7440-47-3
NS
pq/L
0.19 J
0.22 J+
0.5 U
Chromium
T
7440-47-3
10
02L
pg/L
0.92
0.28 J+
0.34 J
Cobalt
D
7440-48-4
NS
pq/L
0.5 U
0.72
1.1
Cobalt
T
7440-48-4
1
IMAC
pg/L
0.5 U
0.79
1.5
Copper
D
7440-50-8
NS
pq/L
3.8
1 UJ
0.27 J
Copper
T
7440-50-8
1000
02L
pq/L
1.2
1 UJ
1 U
Iron
D
7439-89-6
NS
pq/L
160
50 U
50 U
Iron
T
7439-89-6
300
02L
pg/L
440
50 U
120
Lead
D
7439-92-1
NS
pq/L
0.25
0.1 UJ
0.1 U
Lead
T
7439-92-1
15
02L
pq/L
0.45
0.1 U
0.088 J
Magnesium
T
7439-95-4
NS
pq/L
19900
5420
6160
Manganese
D
7439-96-5
NS
pq/L
870
640
740
Manganese
T
7439-96-5
50
02L
pg/L
850
670
760
Mercury
D
7439-97-6
NS
pq/L
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pq/L
0.2 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
pq/L
35.8 J
8.5 J+
764 J
Molybdenum
D
7439-98-7
NS
pq/L
0.32 J
20.7
19.7
Molybdenum
T
7439-98-7
NS
pq/L
0.3 J
19.9
24.3
Nickel
D
7440-02-0
NS
pq/L
0.6
1.2 J+
1.2
Nickel
T
7440-02-0
100
02L
pq/L
1
1.1 J+
1.6
Potassium
T
7440-09-7
NS
pq/L
5000 U
4080 J
4880 J
Selenium
D
7782-49-2
NS
pq/L
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pg/L
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
pq/L
18300
12900
15600
Strontium
D
7440-24-6
NS
pq/L
950
320
420
Strontium
T
7440-24-6
NS
pq/L
890
370
420
Thallium
D
7440-28-0
NS
pq/L
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
pg/L
0.1 U
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pq/L
1 U
1.6
0.41 J
Vanadium
T
7440-62-2
0.3
IMAC
pg/L
0.72 J
1.5
0.76 J
Zinc
D
7440-66-6
NS
pq/L
10 U
10 UJ
10 U
Zinc
T
7440-66-6
1000
02L
pg/L
2.9 J
10 UJ
2.9 J
Total Dissolved Solids
N
TDS
500000
02L
pg/L
599000
137000
151000
Total Organic Carbon
N
TOC
NS
pq/L
1000 U
1000 U
650 J
Total Suspended Solids
N
TSS
NS
pq/L
4700
5000 U
4000
Alkalinity, CO3
N
ALK-CO3
NS
pq/L
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pq/L
152000
58200
76900
Alkalinity, lab
N
ALK-LAB
NS
pq/L
152000
58200
76900
Chloride
N
16887-00-6
250000
02L
pq/L
17900
11200
11700
Nitrite as N
N
14797-65-0
1000
02L
pq/L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pg/L
20 U
20 UJ
20 U
Sulfate
N
14808-79-8
250000
02L
pg/L
269000
37000
23200
Sulfide
N
18496-25-8
NS
pq/L
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pq/L
0.2 U
1.04
As(V)
T
10103-60-3
NS
pq/L
0.2 U
17.9
Chromium (VI)
T
18540-29-9
0.07
DHHS
pg/L
0.0103303103000000
0.029 J+
Fe(II)
T
1345-25-1
NS
pq/L
192
20 U
Fe(III)
T
1309-37-1
NS
pq/L
431
7.1
Mn(II)
T
1344-43-0
NS
pq/L
1020
645
Mn(IV)
T
1313-13-9
NS
pq/L
17.44583628380
24.6
Se(IV)
T
10102-18-8
NS
pq/L
0.5 U
0.5 U
Se(VI)
T
13410-01-0
NS
pq/L
0.5 U
0.5 U
Uranium, Natural
T
7440-61-1
NS
pq/L
Page 11 of 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-21D
MW-21D
MW-21S
MW-21S
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
Round 1 (CSA Sampling)
Round 2 (3Q-2015)
6/24/2015
9/10/2015
6/24/2015
9/10/2015
N
N
N
N
MW-21D
DR-MW-2ID-NS-3Q15
MW-21S
DR-MW-21S-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi/L
Radium-228
T
15262-20-1
NS
pCi/L
Uranium-233
T
13968-55-3
NS
uq/L
Uranium-234
T
13966-29-5
NS
pq/L
Uranium-236
T
13982-70-2
NS
uq/L
Dissolved Oxygen
N
DO
NS
mg/L
0.47
0.5
Temp (Celcius)
N
TEMP
NS
Deg C
18.5
19.2
pH (field)
N
PH
6.5
8.5
02L
SU
7.11
6.69
Turbidity, field
N
TURB
--
NS
NTU
8.6
5.1
Spec. Cond. (field)
N
Sc
NS
PS/cm
820
250
Oxidation Reduction Potential
N
ORP
NS
my
-12
140
GW Depth (TOC)
N
JGW DEPTH-TOCI
NS
ft
3.9
5.18
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
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 2-10 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Constituent:
Unit:
NC GW Criteria:
Turbidity, field
NTL1
pH
Su
8.5
Iron
.
00
Manganese
.
50
Chromium (VI)
.
0.07
Antimony
.
1
Arsenic
.
10
Beryllium
.
4
Boron
.
700
Chromium
.
10
Cobalt
.
1
Iron
.
300
Lead
.
Manganese
.
Selenium
.
PPBC (Minimum (for ranges)):
SCREENING ONLY
-
�®-.
•
�a�a�a�a���a�a�a�a���a�a�a�a�a�
�®-.
• -
�a�a�a�a�a�a�a�a�a�a�a�a�a���a�
®-.
•
�a�a�a�a���a�a�a�a�a�a�a�a�a�a�
• �
®-
•
�a�a�a�a�
' '
�a�a�a�a�a�a�a�a�a�a�
®-
•
���a�a�a�a�a�a�a�a�a�a�a�a�a�a�
®-
•
���a�a�a�a�a�a�a�a�a�a�a�a�a�a�
®-.
• -
�®�a�a�a�a�a�a�a�a�a�a�a�a�a�a�
�®-.
• -
�a�a�a�a���a�a�a�a�a�a���a�a�a�
®-
•
�®�a�a�a�a�a�a�a�a�a�a�a�a�a�a�
Page 1 of 6

Table 2-10 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Constituent:
Unit:
NC GW Criteria:
Turbidity, field
NTL1
pH
Su
8.5
Iron
.
00
Manganese
.
50
Chromium (VI)
.
0.07
Antimony
.
1
Arsenic
.
10
Beryllium
.
4
Boron
.
700
Chromium
.
10
Cobalt
.
1
Iron
.
300
Lead
.
Manganese
.
Selenium
.
PPBC (Minimum (for ranges)):
SCREENING ONLY
-
�®-
•
�a�a�a�a�a�a�a�a�a�a���a�a�
"
�a�
•�®-
•
���a�a�a�a�a�a�a�a�a�a���a�a�a�
®-
•
�a�a�a�a�a�a�a�a�a�a���a�a�
"
�a�
®-
•
�a�a�a�a�a�a�a�a�a�a�a���a���a�
®-
•
�a�a�a�a�a�a�a�a�a�a�a���a�
• "
�a�
Page 2 of 6

Table 2-10 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Turbidity, field
N
NTU
pH
N
SU
8.5
02L
Iron
T
pg/L
300
02L
Manganese
T
pg/L
50
02L
Chromium (VI)
T
pg/L
0.07
DHHS
Antimony
T
pg/L
1
IMAC
Arsenic
T
pg/L
10
02L
Beryllium
T
pg/L
4
IMAC
Boron
T
pg/L
700
02L
Chromium
T
pg/L
10
02L
Cobalt
T
pg/L
1
IMAC
Iron
T
pg/L
300
02L
Lead
T
pg/L
15
02L
Manganese
T
pg/L
50
02L
Selenium
T
pg/L
20
02L
PPBC (Minimum (for ranges)):
PPBC:
SCREENING ONLY
10
6.65
6.78
-
10
-
63
-
0.09
-
1
-
1
-
0.2
-
50
-
5
-
0.5
-
10
-
10
-
63
-
1
Well
Matrix
Event
Date
Result Flag
1 Result Flag
1 Result Flag
1 Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
1 Result Flag
Result Flag
MW-308BR
WG
Round 2
9/9/2015
6.2
9.3
5300
5400
MW-310BR
WG
Round 1
6/16/2015
9.92
-
377
110
MW-310BR
WG
Round 2
9/9/2015
9.1
8.8
410
-
MW-311BR
WG
Round 1
6/29/2015
39.18
1200
580
MW-311BR
WG
Round 2
9/11/2015
20.6
810
1100
540
MW-314BR
jWG
Round 1
6/25/2015
7.63
-
380
-
MW-314BR
WG
Round 2
9/11/2015
8.35
1.6
65
MW-315BR
WG
Round 1
6/19/2015
13.34
-
24.8
2.2
1300
1800
MW-315BR
WG
Round 2
9/8/2015
21.23
-
-
2.6
-
-
MW-317BR
WG
Round 1
6/5/2015
3.12
11.44
2.1
11
-
MW-317BR
WG
Round 2
9/8/2015
7.4
11.6
5.6
14.8
-
-
-
MW-318D
WG
Round 1
6/2/2015
10.63
5.51
-
1310
-
13
J
1150
577
MW-318D
IWG
Round 2
9/9/2015
6.08
5.23
1300
6.7
720
430
MW-9
WG
Round 1
6/30/2015
84.09
-
6.4
990
1000
MW-9D
WG
Round 1
6/24/2015
66
1000
1.5
2600
600
MW-9D
WG
Round 2
9/11/2015
48.29
6.44
1100
-
2.7
1400
1100
OW-303D
WG
Round 2
9/12/2015
-
-
2.9
55
1000
15.1
53.2
14900
4500
OW-308D
WG
Round 1
6/25/2015
4.53
6.2
-
620
-
-
-
36400
580
OW-308D
WG
Round 2
9/11/2015
8.5
6.2
759
-
-
34700
690
OW-310D
WG
Round 1
6/23/2015
2.28
-
809
1 100
1.2
1400
1200
OW-310D
WG
Round 2
9/11/2015
5.82
-
782
980
1.9
3500
1600
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 3 of 6

Table 2-10 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Thallium
T
lag/L
0.2
IMAC
Vanadium
T
lag/L
0.3
IMAC
)tal Dissolved Soli
N
lag/L
500000
02L
Sulfate
N
lag/L
250000
02L
PPBC (Minimum (for ranges)):
PPBC:
-
0.2
-
1
-
280000
-
31000
Well
Matrix
Event
Date
Result Flag
1 Result Flag
1 Result Flag
Result Flag
AB-10D
WG
Round 1
6/24/2015
1.5
AB-10D
WG
Round 2
9/11/2015
0.63
J
1320000
AB-10S
PW
Round 1
6/26/2015
0.54
3
AB-10S
PW
Round 2
9/11/2015
0.31
3.3
AB-10SL
PW
Round 1
6/26/2015
-
14.6
AB-10SL
PW
Round 2
9/11/2015
0.44
30.7
AB-15S
PW
Round 1
6/22/2015
3.4
254
AB-25BR
WG
Round 1
6/26/2015
-
5.5
AB-25BR
WG
Round 2
9/11/2015
1.7
AB-25D
WG
Round 1
6/26/2015
0.69
J
AB-25D
WG
Round 2
9/12/2015
0.64
J
AB-25S
PW
Round 1
6/26/2015
13.3
AB-25S
PW
Round 2
9/11/2015
1.5
689
AB-30BR
WG
Round 1
6/24/2015
-
0.91
J
AB-30BR
WG
Round 2
9/10/2015
0.67
J
AB-30D
WG
Round 1
6/24/2015
0.86
J
AB-30D
WG
Round 2
9/11/2015
1.1
AB-30S
WG
Round 1
6/29/2015
-
AB-30S
WG
Round 2
9/10/2015
18.3
AB-35BR
WG
Round 1
6/25/2015
1.8
AB-35BR
WG
Round 2
9/10/2015
1.8
J
905000
J
AB-5D
WG
Round 1
6/18/2015
0.77
J
-
AB-5D
WG
Round 2
9/9/2015
-
AB-5S
PW
Round 1
6/19/2015
0.69
0.62
J
AB-5S
PW
Round 2
9/9/2015
1.6
33.7
AS-10D
WG
Round 1
6/8/2015
-
15.3
AS-10D
WG
Round 2
9/8/2015
30.6
AS-12S
WG
Round 1
6/9/2015
1.1
AS-12S
WG
Round 1
6/9/2015
-
AS-12S
WG
Round 2
9/8/2015
0.52
J
AS-21D
WG
Round 1
6/17/2015
1.6
AS-21D
WG
Round 2
9/3/2015
1.4
AS-41D
WG
Round 1
6/5/2015
4.8
AS-41D
WG
Round 2
9/3/2015
-
AS-6D
WG
Round 1
6/8/2015
0.69
J+
AS-61D
WG
Round 2
9/8/2015
0.4
J
AS-8BR
WG
Round 1
6/9/2015
2.7
AS-8BR
WG
Round 2
9/8/2015
-
AS-8D
WG
Round 1
6/2/2015
1.88
J
AS-81D
WG
Round 2
9/9/2015
-
BG-1D
WG
Round 3
11/16/2015
45.8
BG-1D
WG
Round 4
12/15/2015
43
BG-5D
WG
Round 1
6/23/2015
-
BG-5D
WG
Round 2
9/9/2015
0.46
J
BG-5D
WG
Round 3
11/16/2015
-
BG-5D
WG
Round 4
12/15/2015
-
BG-5S
WG
Round 1
6/24/2015
2.6
BG-5S
WG
Round 2
9/9/2015
0.82
J
BG-5S
WG
Round 3
11/16/2015
0.31
J
BG-5S
WG
Round 4
12/15/2015
-
-
GWA-10D
WG
Round 1
6/4/2015
0.256
3.36
GWA-10D
WG
Round 1
6/26/2015
-
-
GWA-10D
WG
Round 2
9/8/2015
1.3
GWA-11D
WG
Round 1
6/5/2015
1.2
J+
GWA-11D
WG
Round
9/3/2015
0.45
J
GWA-11S
WG
Round 1
6/10/2015
0.52
J
GWA-11S
WG
Round 2
9/3/2015
0.63
IJ
GWA-12D
WG
Round 1
6/4/2015
5.65
GWA-12D
WG
Round 2
9/9/2015
3.7
GWA-12D
WG
Round 3
11/19/2015
3.1
GWA-12D
WG
Round 4
12/15/2015
2.3
GWA-12S
WG
Round 1
6/4/2015
-
GWA-12S
I WG
Round 2
9/11/2015
0.93
J
GWA-12S
WG
Round 4
12/18/2015
2.4
J+
GWA-14D
WG
Round 1
6/30/2015
0.67
IJ
GWA-14D
WG
I Round 2
9/9/2015
0.62
J
GWA-14S
WG
Round 2
9/9/2015
0.48
J
GWA-15D
WG
Round 1
6/30/2015
1.5
705000
307000
GWA-15D
WG
Round 2
9/10/2015
3.2
618000
301000
Page 4 of 6

Table 2-10 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Thallium
T
lag/L
0.2
IMAC
Vanadium
T
lag/L
0.3
IMAC
)tal Dissolved Soli
N
lag/L
500000
02L
Sulfate
N
lag/L
250000
02L
PPBC (Minimum (for ranges)):
PPBC:
-
0.2
-
1
-
280000
-
31000
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Flag
GWA-1D
WG
Round 1
6/11/2015
0.79
J
GWA-1D
WG
Round 2
9/8/2015
0.45
J
GWA-1S
WG
Round 1
6/17/2015
1.5
GWA-1S
WG
Round 2
9/9/2015
0.39
J
GWA-2D
WG
Round 1
6/10/2015
0.57
J
GWA-2D
IWG
Round 2
9/8/2015
0.65
J
GWA-2S
WG
Round 1
6/11/2015
1.3
GWA-2S
WG
Round 2
9/4/2015
4.1
GWA-3D
WG
Round 1
6/4/2015
-
GWA-3D
WG
Round 2
9/4/2015
0.6
J
GWA-3S
WG
Round 1
6/4/2015
-
GWA-3S
WG
Round 2
9/4/2015
0.56
J
GWA-4D
WG
Round 1
6/23/2015
1.5
GWA-4D
WG
Round 2
9/9/2015
0.53
J
GWA-4S
WG
Round 1
6/19/2015
0.6
J
GWA-4S
WG
Round 2
9/10/2015
4.3
GWA-5BR
WG
Round 1
6/16/2015
0.49
J
873000
416000
GWA-5BR
WG
Round 2
9/9/2015
-
799000
362000
GWA-6D
WG
Round 1
6/29/2015
-
-
GWA-6D
WG
Round 2
9/11/2015
-
GWA-6S
WG
Round 1
6/30/2015
6.5
GWA-6S
WG
Round 2
9/12/2015
1.1
GWA-7D
WG
Round 1
6/16/2015
-
GWA-7D
WG
Round 2
9/10/2015
-
GWA-7S
WG
Round 1
6/19/2015
0.38
J
GWA-7S
WG
Round 2
9/10/2015
-
GWA-8D
WG
Round 1
6/5/2015
5.2
690000
J-
368000
GWA-8D
WG
Round 2
9/9/2015
1.3
726000
346000
GWA-8S
WG
Round 1
6/18/2015
0.45
J
-
-
GWA-9D
WG
Round 1
6/15/2015
1.8
-
GWA-9D
WG
Round 2
9/9/2015
-
GWA-9D
WG
Round 3
11/16/2015
0.38
J
GWA-9D
WG
Round 4
12/15/2015
0.39
J
GWA-9S
WG
Round 1
6/19/2015
5.1
GWA-9S
WG
Round 2
9/9/2015
0.59
J
GWA-9S
WG
Round 3
11/16/2015
0.65
J
GWA-9S
WG
Round 4
12/15/2015
0.74
J
MW-10
WG
Round 2
9/11/2015
-
MW-10D
WG
Round 1
6/24/2015
MW-10D
WG
Round 2
9/11/2015
-
MW-11
WG
Round 1
6/29/2015
2.6
MW-11
WG
Round 2
9/11/2015
0.58
J
MW-11D
WG
Round 1
6/29/2015
-
MW-11D
WG
Round
9/11/2015
0.51
J
MW-12
WG
Round 1
6/20/2015
2.6
MW-12
WG
Round 2
9/9/2015
-
MW-12D
WG
Round 1
6/20/2015
1.4
MW-12D
WG
Round 2
9/9/2015
-
MW-20D
WG
Round 1
6/24/2015
0.41
J
MW-20S
WG
Round 1
6/24/2015
-
MW-21D
WG
Round 1
6/23/2015
-
639000
274000
MW-21D
WG
Round
9/10/2015
0.72
J
599000
269000
MW-21S
I WG
Round 1
6/24/2015
1.5
MW-21S
WG
Round 2
9/10/2015
0.76
J
MW-22BR
WG
Round 1
6/25/2015
0.33
J
MW-22BR
WG
Round 2
9/11/2015
1.2
MW-22S
WG
Round 1
6/25/2015
0.74
J
MW-23BR
WG
Round 1
6/1/2015
0.55
1.38
MW-23BR
WG
Round 2
9710/2015
-
-
MW-23BR
WG
Round 4
12/15/2015
0.31
J
MW-23D
WG
Round 1
6/30/2015
-
MW-23D
WG
Round 4
12/15/2015
1.2
MW-301BR
WG
Round 1
6/11/2015
1.8
MW-301BR
WG
Round 2
9/4/2015
0.81
J
MW-303BR
WG
Round 1
6/12/2015
3.7
MW-303BR
IWG
Round 2
9/4/2015
2
MW-306BR
lwg
Round 1
6/12/2015
1.6
530000
MW-306BR
WG
Round 2
9/4/2015
1.6
778000
J+
345000
MW-308BR
JWG
I Round 1
1 6/15/2015
0.84
J
844000
323000
Page 5 of 6

Table 2-10 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Thallium
T
tag/L
0.2
IMAC
Vanadium
T
tag/L
0.3
IMAC
)tal Dissolved Soli
N
tag/L
500000
02L
Sulfate
N
tag/L
250000
02L
PPBC (Minimum (for ranges)):
PPBC:
-
0.2
-
1
-
280000
-
31000
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Flag
MW-308BR
WG
Round 2
9/9/2015
-
1300000
-
586000
MW-310BR
WG
Round 1
6/16/2015
2.5
-
MW-310BR
WG
Round 2
9/9/2015
3.7
MW-311BR
WG
Round 1
6/29/2015
0.89
J
MW-311BR
WG
Round 2
9/11/2015
0.62
J
MW-314BR
IWG
Round 1
6/25/2015
1.3
MW-314BR
WG
Round 2
9/11/2015
0.82
J
MW-315BR
WG
Round 1
6/19/2015
1.4
MW-315BR
WG
Round 2
9/8/2015
5.5
MW-317BR
WG
Round 1
6/5/2015
8.4
MW-317BR
WG
Round 2
9/8/2015
5.9
MW-318D
WG
Round 1
6/2/2015
0.654
J
MW-318D
WG
Round 2
979/2015
-
MW-9
WG
Round 1
6/30/2015
2.3
MW-9D
WG
Round 1
6/24/2015
11.1
MW-9D
WG
Round 2
9/11/2015
2.7
OW-303D
WG
Round 2
9/12/2015
0.56
36.5
OW-308D
WG
Round 1
6/25/2015
-
-
OW-308D
WG
Round 2
9/11/2015
OW-310D
WG
Round 1
6/23/2015
1.2
OW-310D
WG
Round 2
1 9/11/20151
3.2
Notes:
1. This table only shows concentrations of constituents that excee
2. If a constituent does not have a regulatory criterion (aluminum,
Orange indicates concentration greater than PPBC
Green indicates concentration less than PPBC
tag/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
IMAC = Interim Maximum Allow Concentration
N = normal
NTU = nephelometric turbidity unit
PPBC = Proposed Provisional Background Concentration
PW = porewater
T = total
WG = groundwater
Page 6 of 6

Table 2-11 Surface Water Sample Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-1
SW-1
SW-10
SW-10
SW-11
SW-12
SW-13
SW-13
SW-3
Round 1
Round 2
Round 2
Round 2
Round 2
Round 2
Round 2
Round 2
Round 1
5/27/2015
9/11/2015
9/14/2015
9/14/2015
9/14/2015
9/14/2015
9/14/2015
9/14/2015
5/27/2015
N
N
N
N
N
N
N
N
N
SW-1
DR-SW-1-NS-3Q15
DR-SW-10-NS-3Q15
DR-SW-10-WS-3Q15
DR-SW-11-NS-3Q15
DR-SW-12-NS-3Q15
DR-SW-13-NS-3Q
DR-SW-13-NS-3Q15
SW-3
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Aluminum
7429-90-5
D
/L
43
100 U
100 U
100 U
100 U
100 U
12
Aluminum
7429-90-5
T
87
u /L
■
100 U
330
140
69 J
79 J
27600
Antimon
7440-36-0
D
/L
.02
jj613
1.1
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Antimon
7440-36-0
T
640
/L
.21
0.97
0.15 J
0.5 U
0.5 U
0.5 U
1 U
Arsenic
7440-38-2
D
150
/L
13.8
31.8
40.4
1.7
1.6
0.93
42.7
Arsenic
7440-38-2
T
10
N /L
37.9
49.4
2.1
1.8
1
63.7
Barium
7440-39-3
D
/L
20
110
34
27
26
23
42
Barium
7440-39-3
T
200000
/L
18
120
38
30
30
23
267
Beryllium
7440-41-7
D
6.5
/L
1 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1 U
Beryllium
7440-41-7
T
/L
1 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1.16
Boron
7440-42-8
D
/L
180
180
170
120
89
65
128
Boron
7440-42-8
T
/L
157
190
160
130
100
62
107
Cadmium
7440-43-9
D
0.15
/L
1 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
Cadmium
7440-43-9
T
/L
1 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
Calcium
7440-70-2
T
/L
19700
20800
22700
20000
20400
19300
20000
Chromium
7440-47-3
D
11
/L
1 U
0.25 J
0.26 J
0.2 J
0.2 J
0.34 J
1 U
Chromium
7440-47-3
T
/L
1 U
0.26 J
0.37 J
0.24 J
0.24 J
0.49 J
33.6
Cobalt
7440-48-4
D
/L
1 U
0.5 U
0.46 J
0.52
0.59
0.45 J
1 U
Cobalt
7440-48-4
T
4
u /L
1 U
0.22 J
0.88
0.65
0.9
0.54
- 'f&$ J
Copper
7440-50-8
D
2.7
u /L
3.39 J+
0.52 J
8.7 J
10.7
2.4
1 UJ
Copper
7440-50-8
T
/L
4.75
0.3 J
0.63 J
0.54 J
0.61 J
0.65 J
27.3
Iron
7439-89-6
D
/L
21
50 U
50 U
50 U
50 U
50 U
40
Iron
7439-89-6
T
/L
323
220
630
310
240
240
42400
Lead
7439-92-1
D
0.54
u /L
1 U
0.22
0.26
0.85 J
1.3
0.19
1 U
Lead
7439-92-1
T
/L
1 U
0.06 J
0.36
0.15
0.14
0.098 J
20.1
Magnesium
7439-95-4
T
/L
7240
6680
6680
6390
6610
6370
5850
Manganese
7439-96-5
D
/L
16
59
400
250
270
150
584
Manganese
7439-96-5
T
/L
9
140
520
280
430
160
1820
Mercury
7439-97-6
T
0.012
/L
0.0011 J+
0.00778
0.00125
0.000988
0.000792
0.000671
0.00385 J+
Methane
74-82-8
N
/L
10 UJ
15
39.1
26.8
45.9
31.4
20 UJ
Molybdenum
7439-98-7
D
/L
9.11
10.8
9.1
5.7
4.1
2.7
2.56
Molybdenum
7439-98-7
T
2000
/L
9.36
9.7
8.6
6
4.5
2.7
9.85
Nickel
7440-02-0
D
16
/L
1.2
1.6
0.65
0.76
0.75
0.47 J
1 U
Nickel
7440-02-0
T
/L
2.5
1.6
0.72
0.62
0.63
0.53
15.9
Potassium
7440-09-7
T
/L
3090
5540
3620 J
2800 J
2660 J
5000 U
3710
Selenium
7782-49-2
D
/L
2.32
1.9
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Selenium
7782-49-2
T
5
/L
2.87
2
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Sodium
7440-23-5
T
/L
11500
8890
13300
12700
11900
11100
10800
Strontium
7440-24-6
D
/L
322
290
310
240
220
210
264
Strontium
7440-24-6
T
40000
/L
320
300
300
250
250
200
302
Thallium
7440-28-0
D
/L
0.2 U
0.021 J
0.1 U
0.1 U
0.1 U
0.1 U
0.2 U
Thallium
7440-28-0
T
0.47
/L
0.2 U
0.019 J
0.1 U
0.1 U
0.1 U
0.1 U
0.315
Vanadium
7440-62-2
D
/L
4.94
2.4
1 U
1 U
1 U
1 U
1.25
Vanadium
7440-62-2
T
/L
6.65
2.5
0.98 J
0.8 J
0.85 J
0.57 J
54.1
Zinc
7440-66-6
D
36
/L
34 J+
10 U
8.7 J
10 U
10 U
12
5 UJ
Zinc
7440-66-6
T
/L
212
10 U
10 U
10 U
10 U
10 U
93
Total Dissolved Solids
TDS
N
/L
140000
136000
144000
135000
127000
124000
120000
Total Organic Carbon
TOC
N
/L
3800
4500
1100
1200
15400
1600
2200
Total Suspended Solids
TSS
N
/L
16000
3500
16000
2800
3500
2600 U
680000
Alkalinity, CO3
ALK-CO3
N
/L
11000
5000 U
5000 U
5000 U
5000 U
5000 U
10000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
23000
45400
85400
81900
72000
72800
51000
Alkalinity, lab
ALK-LAB
N
/L
37000
45400
85400 J-
81900 J-
72000 J-
72800 J-
51000
Chloride
16887-00-6
N
230000
/L
11000
8900
11600
11600
11500
11600
11000
Nitrite as N
14797-65-0
N
/L
29
76
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
47
28 J
32
25
Sulfate
14808-79-8
N
/L
53000
40200
20100
18100
14700
12900
23000
Sulfide
18496-25-8
N
/L
100 U
100 U
-
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
u /L
-
-
47.4
-
1.51 J
1.83
0.658
-
-
Chromium
7440-47-3
T
/L
0.474 J
1 J
0.69 J
0.386 J
Iron
7439-89-6
T
/L
155 J
216 J
199 J
195 J
Manganese
7439-96-5
D
/L
434 J
232 J
266 J
141 J
Manganese
7439-96-5
T
/L
425 J
277 J
291 J
156 J
As III
7784-46-5
T
/L
19.7
0.841 J
0.971
0.516
As V
10103-60-3
T
/L
27.7
0.668 J
0.857
0.5 U
Chromium VI
18540-29-9
T
/L
0.012 J
0.018 J
0.016 J
0.019 J
Fe II
1345-25-1
T
/L
30 UJ
11.4 J
30 UJ
16.1 J
Fe III
1309-37-1
T
/L
Mn II
1344-43-0
T
/L
Page 1 of 6

Table 2-11 Surface Water Sample Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-1
SW-1
SW-10
SW-10
SW-11
SW-12
SW-13
SW-13
SW-3
Round 1
Round 2
Round 2
Round 2
Round 2
Round 2
Round 2
Round 2
Round 1
5/27/2015
9/11/2015
9/14/2015
9/14/2015
9/14/2015
9/14/2015
9/14/2015
9/14/2015
5/27/2015
N
N
N
N
N
N
N
N
N
SW-1
DR-SW-I-NS-3Q15
DR-SW-10-NS-3Q15
DR-SW-10-WS-3Q15
DR-SW-I1-NS-3Q15
DR-SW-12-NS-3Q15
DR-SW-13-NS-3Q
DR-SW-13-NS-3Q15
SW-3
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Mn IV
1313-13-9
T
/L
Se IV
10102-18-8
T
/L
2 U
2 U
2 U
2 U
Se VI
13410-01-0
T
/L
2 U
2 U
2 U
2 U
Dissolved Oxygen
DO
N
m /L
2.5
7.76
Temperature
TEMP
N
Deg C
27.4
16.2
H
PH
N
6
9
SU
7.3
7.4
Turbidity, field
TURB
N
NTU
5.61
8.85
Specific Conductivityfield
Sc
N
PS/cm
219.1
200.9
Oxidation Reduction Potential
1 ORP
N
mV
125.7
148.8
Notes:
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 Surface Water Sample Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-3
SW-3
SW-4
SW-4
SW-4
SW-5
SW-5
SW-5
SW-6
Round 1
Round 2
Round 1
Round 1
Round 2
Round 1
Round 1
Round 2
Round 1
6/18/2015
9/11/2015
5/27/2015
6/18/2015
9/11/2015
5/27/2015
6/18/2015
9/11/2015
6/30/2015
N
N
N
N
N
N
N
N
N
SW-3
DR-SW-3-NS-3Q15
SW-4
SW-4
DR-SW-4-NS-3Q15
SW-5
SW-5
DR-SW-5-NS-3Q15
SW-6
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Aluminum
7429-90-5
D
/L
100 U
5 U
100 U
5 U
100 U
Aluminum
7429-90-5
T
87
u /L
250
127
63 J
90
100 U
-
Antimon
7440-36-0
D
/L
0.5 U
1 U
0.5 U
1 U
0.41 J
0.17 J
Antimony
7440-36-0
T
640
/L
0.5 U
1 U
0.5 U
1 U
0.45 J
0.16 J
Arsenic
7440-38-2
D
150
/L
1.7
1 U
0.29 J
1 U
0.42 J
0.17 J
Arsenic
7440-38-2
T
10
N /L
2
1 U
0.14 J
1 U
0.48 J
0.24 J
Barium
7440-39-3
D
/L
27
18
20
24
17
19
Barium
7440-39-3
T
200000
/L
34
18
22
25
18
25
Beryllium
7440-41-7
D
6.5
/L
0.2 U
1 U
0.2 U
1 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
/L
0.2 U
1 U
0.2 U
1 U
0.2 U
0.2 U
Boron
7440-42-8
D
/L
120
50 U
35 J
58
74
150
Boron
7440-42-8
T
/L
120
50 U
29 J
57
72
160
Cadmium
7440-43-9
D
0.15
/L
0.08 U
1 U
0.08 U
1 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
/L
0.08 U
1 U
0.08 U
1 U
0.08 U
0.08 U
Calcium
7440-70-2
T
/L
20800
14000
19500
13800
10700
6300
Chromium
7440-47-3
D
11
/L
0.21 J
1 U
0.24 J
1 U
0.25 J
0.49 J
Chromium
7440-47-3
T
/L
0.64
1 U
0.3 J
1 U
0.63
0.67
Cobalt
7440-48-4
D
/L
0.45 J
1 U
0.5 U
1 U
0.16 J
0.15 J
Cobalt
7440-48-4
T
4
u /L
0.87
1 U
0.18 J
1 U
0.21 J
0.48 J
Copper
7440-50-8
D
2.7
u /L
8.6
7.38 J+
8.1
1 U
2.2
Copper
7440-50-8
T
/L
0.83 J
1 U
0.71 J
4.62 J+
1.2 J+
1.6
Iron
7439-89-6
D
/L
30 J
33
26 J
68
30 J
Iron
7439-89-6
T
/L
580
339
170
412
290
Lead
7439-92-1
D
0.54
u /L
4011
1 U
1
1 U
0.38
0.2
Lead
7439-92-1
T
/L
0.37
1 U
0.087 J
1 U
0.14
0.88
Magnesium
7439-95-4
T
/L
6160
4390
5940
5500
4110
2560
Manganese
7439-96-5
D
/L
210
90
23
315
89
22
Manganese
7439-96-5
T
/L
300
93
46
290
98
83
Mercury
7439-97-6
T
0.012
/L
0.0019 J+
0.000978 J+
0.00202 J+
0.0012 J+
0.00222 J+
0.00334 J+
Methane
74-82-8
N
/L
26.1
10 UJ
6.1 J+
10 UJ
47 J
9.9 J+
Molybdenum
7439-98-7
D
/L
5.9
1 U
0.49 J
1 U
0.61
0.39 J
Molybdenum
7439-98-7
T
2000
/L
5.3
1 U
0.46 J
1 U
0.59
0.26 J
Nickel
7440-02-0
D
16
/L
0.76
1 U
0.48 J
1 U
0.36 J
0.78
Nickel
7440-02-0
T
/L
0.95
1 U
0.36 J
1 U
0.45 J+
0.57
Potassium
7440-09-7
T
/L
2810 J
1410
5000 U
2230
2510 J
5000 U
Selenium
7782-49-2
D
/L
0.5 U
1 U
0.5 U
1 U
0.5 U
0.5 U
Selenium
7782-49-2
T
5
/L
0.5 U
1 U
0.5 U
1 U
0.5 U
0.5 U
Sodium
7440-23-5
T
/L
13000
8640
10600
9210
7210
4010 J
Strontium
7440-24-6
D
/L
260
143
210
134
97
42
Strontium
7440-24-6
T
40000
/L
270
151
200
143
100
45
Thallium
7440-28-0
D
/L
0.1 U
0.2 U
0.1 U
0.2 U
0.1 U
0.025 J
Thallium
7440-28-0
T
0.47
/L
0.1 U
0.2 U
0.1 U
0.2 U
0.1 UJ
0.1 U
Vanadium
7440-62-2
D
/L
0.78 J
0.3 U
0.55 J
0.3 U
0.5 J
1.2
Vanadium
7440-62-2
T
/L
1.1
0.567
1 U
0.42
0.33 J
2.8
Zinc
7440-66-6
D
36
/L
10 U
17 J+
10 U
5 UJ
10 U
4.7 J
Zinc
7440-66-6
T
/L
10 U
5 U
10 U
5 U
10 U
5 J+
Total Dissolved Solids
TDS
N
/L
149000
97000
126000
110000
83000
72000
Total Organic Carbon
TOC
N
/L
1600
1500
2200
2700
4000
3300
Total Suspended Solids
TSS
N
/L
13100
5000 U
3900
5000 U
2500 U
24700
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
10000 U
5000 U
10000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
69600
52000
67100
50000
34700
17600
Alkalinity, lab
ALK-LAB
N
/L
69600
52000
67100
50000
34700
17600
Chloride
16887-00-6
N
230000
/L
12900
10000
13900
13000
9400
9400
Nitrite as N
14797-65-0
N
/L
145
300
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
110 J-
260
Sulfate
14808-79-8
N
/L
15300
5900
5500
10000
6900
5100
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
u /L
-
-
-
-
-
-
Chromium
7440-47-3
T
/L
Iron
7439-89-6
T
/L
Manganese
7439-96-5
D
/L
Manganese
7439-96-5
T
/L
As III
7784-46-5
T
/L
11
0.054
0.144
As V
10103-60-3
T
/L
15.6
0.083
0.208
Chromium VI
18540-29-9
T
/L
0.019
0.029
0.017
Fe II
1345-25-1
T
/L
27.9
9.3
30.2
Fe III
1309-37-1
T
/L
51.5 J+
11.7 J+
28.1 J+
Mn II
1344-43-0
T
/L
242 J-
48.3 J-
239 J-
Page 3 of 6

Table 2-11 Surface Water Sample Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-3
SW-3
SW-4
SW-4
SW-4
SW-5
SW-5
SW-5
SW-6
Round 1
Round 2
Round 1
Round 1
Round 2
Round 1
Round 1
Round 2
Round 1
6/18/2015
9/11/2015
5/27/2015
6/18/2015
9/11/2015
5/27/2015
6/18/2015
9/11/2015
6/30/2015
N
N
N
N
N
N
N
N
N
SW-3
DR-SW-3-NS-3Q15
SW-4
SW-4
DR-SW-4-NS-3Q15
SW-5
SW-5
DR-SW-5-NS-3Q15
SW-6
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Mn IV
1313-13-9
T
/L
15.3
8.9
12.1
Se IV
10102-18-8
T
/L
0.5 U
0.5 U
0.5 U
Se VI
13410-01-0
T
/L
0.5 U
0.5 U
0.5 U
Dissolved Oxygen
DO
N
m /L
5.57
7.27
4.7
7.73
Temperature
TEMP
N
Deg C
19.9
20.2
22.7
29.9
H
PH
N
6
9
SU
7.4
7.2
6.74
7.12
Turbidity, field
TURB
N
NTU
9.38
7.95
3.91
46.47
Specific Conductivityfield
Sc
N
PS/cm
215.9
194.1
128
50.2
Oxidation Reduction Potential
1 ORP
N
mV
111.8
156.7
143.8
157.8
Notes:
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 (<
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 Surface Water Sample Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-6
SW-7
SW-7
SW-8
SW-8
SW-9
SW-9
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
9/10/2015
6/30/2015
9/10/2015
6/30/2015
9/10/2015
5/27/2015
9/11/2015
N
N
N
N
N
N
N
DR-SW-6-NS-3Q15
SW-7
DR-SW-7-NS-3Q15
SW-8
DR-SW-8-NS-3Q15
SW-9
DR-SW-9-NS-3Q15
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
5 U
100 U
Aluminum
7429-90-5
T
87
u /L
380
-
550
-
320
129
360
Antimony
7440-36-0
D
/L
1 0.18 J
0.2 J
0.21 J
0.5 U
0.23 J
1 U
0.58
Antimony
7440-36-0
T
640
/L
0.5 U
0.22 J
0.5 U
0.5 U
0.5 U
1 U
0.72
Arsenic
7440-38-2
D
150
/L
0.21 J
0.14 J
0.21 J
0.14 J
0.33 J
46.3
59
Arsenic
7440-38-2
T
10
u /L
0.37 J
0.24 J
0.35 J
0.22 J
0.2 J
51.1
75.9
Barium
7440-39-3
D
/L
20
18
20
19
20
88
92
Barium
7440-39-3
T
200000
/L
26
29
25
24
24
99
120
Beryllium
7440-41-7
D
6.5
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1 U
0.2 U
Beryllium
7440-41-7
T
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1 U
0.11 J
Boron
7440-42-8
D
/L
220
130
190
170
130
360
380
Boron
7440-42-8
T
/L
240
130
180
180
160
364
400
Cadmium
7440-43-9
D
0.15
/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
0.08 U
Cadmium
7440-43-9
T
/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
0.08 U
Calcium
7440-70-2
T
/L
8020
5910
7770
6340
7850
45400
51600
Chromium
7440-47-3
D
11
/L
0.3 J+
0.24 J
0.24 J+
0.45 J
0.84 J+
1 U
0.45 J
Chromium
7440-47-3
T
/L
0.87
0.68
0.9
0.59
0.41 J
1 U
1
Cobalt
7440-48-4
D
/L
0.5 U
0.5 U
0.13 J
0.5 U
0.43 J
1 U
0.5 U
Cobalt
7440-48-4
T
4
u /L
0.42 J
0.51
0.47 J
0.32 J
0.16 J
1 U
0.74
Copper
7440-50-8
D
2.7
u /L
1.2 J+
2
2.8 J+
AA
1.6 J+
1 U
0.23 J
Copper
7440-50-8
T
/L
1.4 J+
1.8
1.5 J+
1.3
3 J+
5.11 J+
1.7
Iron
7439-89-6
D
/L
140
41 J
29 J
IOU
50 U
Iron
7439-89-6
T
/L
1000
1200
800
140
550
Lead
7439-92-1
D
0.54
u /L
0.26 J+
0.088 J
0.21 J+
0.061 J
t;1.,�f
1 U
0.1 U
Lead
7439-92-1
T
/L
0.73
0.97
0.77
0.64
0.2 J+
1 U
0.83
Magnesium
7439-95-4
T
/L
3380
2480
3310
2580
3280
13500
14300
Manganese
7439-96-5
D
/L
52
16
50
15
63
35
5 U
Manganese
7439-96-5
T
/L
83
98
81
55
94
154
230
Mercury
7439-97-6
T
0.012
/L
0.00194 J+
0.00357 J+
0.00201 J+
0.00296 J+
0.00187 J+
0.000949 J+
0.0011 J+
Methane
74-82-8
N
/L
17.4 J+
9.6 J+
11.7 J+
16.3 J+
35.5 J+
10 UJ
16.4
Molybdenum
7439-98-7
D
/L
0.63
0.41 J
0.62
0.43 J
0.59
7.62
9.4
Molybdenum
7439-98-7
T
2000
/L
0.65
0.26 J
0.56
0.26 J
0.72
7.65
9.8
Nickel
7440-02-0
D
16
/L
0.35 J+
0.58
0.33 J+
1.6
0.59 J+
1 U
0.7
Nickel
7440-02-0
T
/L
0.58 J+
0.6
0.64 J+
0.47 J
0.48 J+
1.16
1.6
Potassium
7440-09-7
T
/L
2510 J
5000 U
2570 J
5000 U
2630 J
4690
5840
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
1 U
0.36 J
Selenium
7782-49-2
T
1
5
/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
1 U
0.45 J
Sodium
7440-23-5
T
/L
6230
4260 J
6900
3900 J
7550
17000
18700
Strontium
7440-24-6
D
/L
57
41
54
43
53
883
1000
Strontium
7440-24-6
T
40000
/L
57
45
52
46
52
895
1100
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
0.1 U
0.1 U
0.018 J
0.2 U
0.017 J
Thallium
7440-28-0
T
0.47
/L
0.022 J
0.1 U
0.025 J
0.1 U
0.1 U
0.2 U
0.035 J
Vanadium
7440-62-2
D
/L
1
0.85 J
0.96 J
0.69 J
2.6
0.701
1.1
Vanadium
7440-62-2
T
/L
3
3.1
3.1
2.5
1
0.947
2.7
Zinc
7440-66-6
D
36
/L
10 UJ
10 U
13 J+
10 U
13 J+
18 J+
10 U
Zinc
7440-66-6
T
/L
10 U
20 J+
10 U
4.6 J+
51
10
16
Total Dissolved Solids
TDS
N
/L
71000
74000
63000
73000 J
68000
270000
290000
Total Organic Carbon
TOC
N
/L
2400
3500
2600
5900
2400
2100
1600
Total Suspended Solids
TSS
N
/L
16100
24500
17100
19200
13300
32000
35200
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
22500
16800
24200
18300
23200
100000
114000
Alkalinity, lab
ALK-LAB
N
/L
22500
16800
24200
18300
23200
100000
114000
Chloride
16887-00-6
N
230000
/L
13000
9400
12100
9800
11600
13000
14500
Nitrite as N
14797-65-0
N
/L
132
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
380
310
460
270
650
210 J-
Sulfate
14808-79-8
N
/L
5000
5000
5300
5000
5300
90000
90300
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
u /L
-
-
-
-
-
-
-
Chromium
7440-47-3
T
/L
Iron
7439-89-6
T
/L
Manganese
7439-96-5
D
/L
Manganese
7439-96-5
T
/L
As III
7784-46-5
T
/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
T
/L
Fe II
1345-25-1
T
/L
Fe III
1309-37-1
T
/L
Mn II
1344-43-0
T
/L
Page 5 of 6

Table 2-11 Surface Water Sample Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-6
SW-7
SW-7
SW-8
SW-8
SW-9
SW-9
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
9/10/2015
6/30/2015
9/10/2015
6/30/2015
9/10/2015
5/27/2015
9/11/2015
N
N
N
N
N
N
N
DR-SW-6-NS-3Q15
SW-7
DR-SW-7-NS-3Q15
SW-8
DR-SW-8-NS-3Q15
SW-9
DR-SW-9-NS-3Q15
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Mn IV
1313-13-9
T
/L
Se IV
10102-18-8
T
/L
Se VI
13410-01-0
T
/L
Dissolved Oxygen
DO
N
m /L
7.68
7.95
6.79
5.8
7.8
Temperature
TEMP
N
Deg C
24.6
25.6
23.7
25.4
28.5
H
PH
N
6
9
SU
7.12
7.3
6.97
6.9
7.6
Turbidity, field
TURB
N
NTU
46.71
35.29
33.08
24.02
17.9
Specific Conductivityfield
SC
N
PS/Gm
49
120.1
50.2
123.1
453.9
Oxidation Reduction Potential
1 ORP
N
mV
1 199.9
157.3
203.7
193.8
90.3
Notes:
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 (<
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 Areas of Wetness Sampling Analytical Results - Rounds 1, 2, and 3
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
S-1
S-1
S-1
S-2
S-3
S-6
Round 1
Round 1
Round 2
Round 2
Round 2
Round 3
5/27/2015
6/26/2015
9/12/2015
9/14/2015
9/14/2015
11/24/2015
N
N
N
N
N
N
S-1
S-1
DR-S-I-NS-3Q15
DR-S-2-NS-3Q15
DR-S-3-NS-3Q15
DR-S-6-NS-4Q15-1
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS, IMACs,
DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
pq/L
5 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
pq/L
3410
4300
280
640
120
Antimony
7440-36-0
D
-
pq/L
1 U
0.34 J
0.5 U
0.25 J
0.5 U
Antimony
7440-36-0
T
1
IMAC
pq/L
1 U
0.45 J
0.5 U
0.26 J
0.5 U
Arsenic
7440-38-2
D
-
pq/L
1 U
7.5
0.5 U
1.7
207
Arsenic
7440-38-2
T
10
02L
pg/L
1.68
14.1
0.16 J
2.3
204 J+
Barium
7440-39-3
D
-
pq/L
20
50
40
55
50
Barium
7440-39-3
T
700
02L
pq/L
54
160
42
62
53
Beryllium
7440-41-7
D
-
pq/L
1 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
pq/L
1 U
1.1
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
-
pq/L
50 U
290
220
260
280
Boron
7440-42-8
T
700
02L
pq/L
50 U
240
210
260
300
Cadmium
7440-43-9
D
-
pq/L
1 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
pq/L
1 U
0.085
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
-
pq/L
14400
25200 J-
16900
21000
29800
Chromium
7440-47-3
D
-
pq/L
1 U
0.22 J+
0.21 J
0.39 J
0.25 J+
Chromium
7440-47-3
T
10
02L
pg/L
3.86
17.6
0.28 J
0.42 J
0.81 J+
Cobalt
7440-48-4
D
-
pg/L
1 U
3.1 J+
0.37 J
1.1
0.7
Cobalt
7440-48-4
T
1
IMAC
pg/L
4.88
17.5
0.5 J
1.9
0.88
Copper
7440-50-8
D
-
pq/L
5.62
1.4 J+
1 U
1.4
1 U
Copper
7440-50-8
T
1000
02L
pq/L
6.15 J+
13.4 J+
0.24 J
0.43 J
0.41 J
Iron
7439-89-6
D
-
pq/L
18
190
50 U
36 J
140
Iron
7439-89-6
T
300
02L
pg/L
5720
7700
390
970
330
Lead
7439-92-1
D
-
pq/L
1 U
0.16 J+
0.052 J
0.11
0.051 J+
Lead
7439-92-1
T
15
02L
pg/L
3.97
16.2
0.28
0.71
0.25
Magnesium
7439-95-4
T
-
pg/L
1 4500
8430
5260
5860
6690
Manganese
7439-96-5
D
-
pq/L
107
640
87
350
1100
Manganese
7439-96-5
T
50
02L
pg/L
829
940
89
380
1100
Mercury
7439-97-6
T
1
02L
pq/L
0.0005 UJ
0.00845
0.00154
0.00583
0.00231 J+
Methane
74-82-8
N
-
pq/L
10 UJ
219
16.6
14.3
161 J
Molybdenum
7439-98-7
D
pq/L
1.25
18.9
0.33 J
15.2
21.1
Molybdenum
7439-98-7
T
pq/L
1.57
12.3
0.31 J
13.6
18.8
Nickel
7440-02-0
D
-
pq/L
1 U
1 J+
0.36 J
0.81
0.64
Nickel
7440-02-0
T
100
02L
pg/L
3.3
10.6 J+
0.39 J
0.86
0.91 J+
Potassium
7440-09-7
T
-
pq/L
1590
4120 J
4800 J
5270
5820
Selenium
7782-49-2
D
-
pq/L
1 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
pq/L
1 U
2.1
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
-
pq/L
9070
16900
13800
15400
15100
Strontium
7440-24-6
D
pq/L
157
330
240
300
460
Strontium
7440-24-6
T
pq/L
166
380
240
300
470
Thallium
7440-28-0
D
-
pq/L
0.2 U
0.1 U
0.022 J
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
pq/L
0.2 U
0.16
0.031 J
0.044 J
0.028 J+
Vanadium
7440-62-2
D
-
pq/L
0.3 U
1.6
1 U
0.3 J
0.35 J
Vanadium
7440-62-2
T
0.3
IMAC
pg/L
8.06
41.8
0.52 J
1.7
0.89 J
Zinc
7440-66-6
D
-
pq/L
11 J+
13 J+
6.7 J
10
10 U
Zinc
7440-66-6
T
1000
02L
pq/L
17
26
6.6 J
10 U
10 U
Total Dissolved Solids
TDS
N
500000
02L
pq/L
99000
154000
128000
127000
158000
Total Organic Carbon
TOC
N
pq/L
2100
6700
900 J
650 J
670 J+
Total Suspended Solids
TSS
N
-
pq/L
180000
4360000
3700
44000
24700
Alkalinity, CO3
ALK-CO3
N
pq/L
10000 U
5000 UJ
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
pq/L
51000
72500
39300
56700
107000
Alkalinity, lab
ALK-LAB
N
-
pq/L
51000
72500
39300 J-
56700 J-
107000
Chloride
16887-00-6
N
250000
02L
pq/L
10000
11800
11700
11700
10700
Nitrite as N
14797-65-0
N
1000
02L
pq/L
117
-
-
-
-
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
pq/L
-
20 U
28
34
140
Sulfate
14808-79-8
N
250000
02L
pq/L
9400
32600
34600
29100
18100
Sulfide
18496-25-8
N
-
pq/L
200 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
pg/L
-
-
0.275 J
1.17 J-
214
Chromium
7440-47-3
T
10
02L
pq/L
0.56 J
1.36 J
1.32
Iron
7439-89-6
T
300
02L
pg/L
212 J
237 J
1520 J
Manganese
7439-96-5
D
-
pq/L
83.3J
381 J
1120
Manganese
7439-96-5
T
50
02L
pg/L
-
77.4 J
380 J
2100 J
As(III)
7784-46-5
T
-
pq/L
0.402
0.156 J
0.889
146
As(V)
10103-60-3
T
-
pq/L
0.195
0.5 U
0.279 J
67.5
Chromium (VI)
18540-29-9
T
0.07
DHHS
pq/L
0.022 J+
0.011 J
0.0092 J
0.016 J-
Fe(II)
1345-25-1
T
-
pq/L
20 U
32.5 J
27.8 J
166 J
Fe(III)
1309-37-1
T
pq/L
29.9
-
-
-
Mn(II)
1344-43-0
T
pg/L
229
Mn(IV)
1313-13-9
T
pq/L
1 UJ
Page 1 of 2

Table 2-12 Areas of Wetness Sampling Analytical Results - Rounds 1, 2, and 3
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
S-1
S-1
S-1
S-2
S-3
S-6
Round 1
Round 1
Round 2
Round 2
Round 2
Round 3
5/27/2015
6/26/2015
9/12/2015
9/14/2015
9/14/2015
11/24/2015
N
N
N
N
N
N
S-1
S-1
DR-S-I-NS-3Q15
DR-S-2-NS-3Q15
DR-S-3-NS-3Q15
DR-S-6-NS-4Q15-1
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS, IMACs,
DHHS
Criteria
Source
Unit
Se(IV)
10102-18-8
T
pq/L
0.5 U
2 U
2 U
2 U
Se(VI)
13410-01-0
T
pq/L
0.5 U
-
2 U
2 U
2 U
Dissolved Oxygen
DO
N
mg/L
7.02
2.3
4.71
7.02
Temperature
TEMP
11 N
Deg C
24.9
17.1
17.3
17.1
pH
PH
N
6.5
8.5
02L
SU
7.65
7.5
6.89
7.1
Turbidity, field
TURB
N
NTU
5.17
-
19.74
45.89
Specific Conductivity (field)
SC
N
uS/cm
173.8
255.7
180.1
207.8
Oxidation Reduction Potential
ORP
N
mV
208.6
127.9
112
139.3
Notes:
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 2

Table 2-13 NCDEQ Sample Location Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
CCSW001
CCSW001
CCSW002OUT
DRRC001
DRRC001
Round 1
Round 1
Round 2
Round 1
Round 2
7/1/2015
7/1/2015
9/14/2015
7/1/2015
9/14/2015
FD
N
N
N
N
CCSW001-DUP
CCSW001
DR-CCSW002OUT-NS-3Q15
DRRC001
DR-DRRC001-NS-3Q15
Constituent
CAS RN
Fraction
SWQS Criteria
NCDEQ 02B
GWQS Criteria
NCDEQ 02L
Unit
Aluminum
7429-90-5
D
-
-
pg/L
100 U
100 U
Aluminum
7429-90-5
T
-
87
pg/L
-
3500
-
2300
Antimony
7440-36-0
D
-
-
-
pg/L
0.3 J
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
-
640
1
pg/L
0.24 J
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
D
-
150
-
pg/L
0.42 J
0.16 J
0.32 J
0.38 J
Arsenic
7440-38-2
T
-
10
10
pg/L
0.35 J
0.58
0.35 J
1.9
Barium
7440-39-3
D
-
-
-
pg/L
27
72
50
46
Barium
7440-39-3
T
-
200000
700
p /L
33
120
53
86
Beryllium
7440-41-7
D
-
6.5
-
-
pg/L
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
-
-
-
4
p /L
0.2 U
0.21
0.2 U
0.25
Boron
7440-42-8
D
-
-
-
pg/L
50 U
39 J
130
160
Boron
7440-42-8
T
-
-
700
p /L
28 J+
38 J
130 J+
160
Cadmium
7440-43-9
D
-
0.15
-
pg/L
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
-
-
2
p /L
0.08 U
0.08 U
0.08 U
0.05 J
Calcium
7440-70-2
T
-
-
-
-
pg/L
14700
30800
19000
19800
Chromium
7440-47-3
D
-
11
-
-
p /L
1
0.44 J
0.33 J
0.32 J
0.2 J
Chromium
7440-47-3
T
-
-
10
pg/L
0.22 J
2
0.25 J
0.93
Cobalt
7440-48-4
D
-
-
-
-
p /L
0.32 J
0.31 J
1.4
0.63
Cobalt
7440-48-4
T
-
4
-
1
pg/L
0.34 J
4.6
1.5
3.6
Copper
7440-50-8
D
-
2.7
-
-
pg/L
0.88 J
7.5
0.45 J
7.3
Copper
7440-50-8
T
-
-
-
1000
pg/L
0.95 J
3.8
0.49 J
2.4
Iron
7439-89-6
D
-
-
pg/L
-
50 U
-
100
Iron
7439-89-6
T
-
-
300
pg/L
-
5200
-
9900
Lead
7439-92-1
D
-
0.54
pg/L
0.12
0.78
0.1 U
0.76
Lead
7439-92-1
T
-
-
15
pg/L
0.09 J
1.6
0.092 J
2.5
Magnesium
7439-95-4
T
-
-
-
pg/L
2210
11700
12200
13300
Manganese
7439-96-5
D
-
-
-
pg/L
83
250
2100
1000
Manganese
7439-96-5
T
-
-
50
pg/L
160
1400
2200
1500
Mercury
7439-97-6
T
-
0.012
1
pg/L
0.000623
0.011
0.000684
0.0425
Methane
74-82-8
N
-
-
pg/L
8 J+
2.6 J+
23.7
30.5
Molybdenum
7439-98-7
D
-
-
pg/L
1.5
0.47 J
0.36 J
0.33 J
Molybdenum
7439-98-7
T
-
2000
pg/L
1.4
0.5 U
0.37 J
0.15 J
Nickel
7440-02-0
D
-
16
-
pg/L
0.54
1
1.7
1.3
Nickel
7440-02-0
T
-
-
100
pg/L
0.7
3.7
1.9
2.6
Potassium
7440-09-7
T
-
-
-
pg/L
4750 J
12200
5000 U
5000 U
Selenium
7782-49-2
D
-
-
-
pg/L
0.85
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
-
5
20
pg/L
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
-
-
-
p /L
11100
12200
19400
21000
Strontium
7440-24-6
D
-
-
-
pg/L
65
160
240
230
Strontium
7440-24-6
T
-
40000
-
p /L
68
170
250
270
Thallium
7440-28-0
D
-
-
-
-
pg/L
0.091 J
0.1 U
0.1 U
0.1 U
Thallium
7440-28-0
T
-
0.47
0.2
p /L
0.025 J
0.1 U
0.036 J
0.026 J
Vanadium
7440-62-2
D
-
-
-
pg/L
1
0.56 J
0.49 J
1 U
1 U
Vanadium
7440-62-2
T
-
-
0.3
pg/L
0.55 J
3.3
0.29 J
2.6
Zinc
7440-66-6
D
-
36
pg/L
10 U
5.3 J
6.8 J
5 J
Zinc
7440-66-6
T
-
-
1000
pg/L
10 U
33
5 J
36
Total Dissolved Solids
TDS
N
-
-
500000
pg/L
112000
177000
186000
185000
Total Organic Carbon
TOC
N
-
-
-
pg/L
6000
2500
12500
2700
Total Suspended Solids
TSS
N
-
-
-
pg/L
4200 U
183000
2500 U
363000
Alkalinity, CO3
ALK-CO3
N
-
-
pg/L
5000 U
5000 U
5000 U
5000 UJ
Alkalinity, HCO3
ALK-HCO3
N
-
-
-
-
pg/L
22300
117000
70900
82000
Alkalinity, lab
ALK-LAB
N
-
-
-
-
p /L
22300
117000
70900
82000
Chloride
16887-00-6
N
-
230000
-
250000
pg/L
16400
7000
12600
14000
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
-
-
-
p /L
22
300
170
110
Sulfate
14808-79-8
N
-
-
250000
pg/L
22900
15400
38400
46000
Sulfide
1 18496-25-8
1 N
-
-
p /L
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
-
10
10
pg/L
0.5 U
0.203 J
Chromium
7440-47-3
T
-
-
10
p /L
1.54 J+
1.54 J+
Page 1 of 2

Table 2-13 NCDEQ Sample Location Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
CCSW001
CCSW001
CCSWO02OUT
DRRC001
DRRC001
Round 1
Round 1
Round 2
Round 1
Round 2
7/1/2015
7/1/2015
9/14/2015
7/1/2015
9/14/2015
FD
N
N
N
N
CCSWO01-DUP
CCSW001
DR-CCSW0020UT-NS-3Q15
DRRC001
DR-DRRC001-NS-3Q15
Constituent
CAS RN
Fraction
SWQS Criteria
NCDEQ 02B
GWQS Criteria
NCDEQ 02L
Unit
Iron
7439-89-6
T
-
300
pg/L
266 J+
2210 J
Manganese
7439-96-5
D
-
pg/L
249 J
1100 J
Manganese
7439-96-5
T
-
50
pg/L
-
-
417 J
-
1220 J
As(III)
7784-46-5
T
-
pg/L
0.2 U
0.2 U
0.5 U
0.24
0.325 J+
As(V)
10103-60-3
T
-
-
pg/L
0.2 U
0.2 U
0.5 U
0.2 U
0.5 U
Chromium (VI)
18540-29-9
T
-
-
0.07
pg/L
0.041
0.056
0.14
0.05 UJ
0.0093 J
Fe(II)
1345-25-1
T
-
-
-
pg/L
23 J
7 J
30 UJ
213
25.5 J+
Fe(III)
1309-37-1
T
-
-
p /L
74.9 J
103 J
-
253
-
Mn(Mn(II)
1344-43-0
T
-
-
-
-
pg/L
62.9
71.1
2470
Mn(IV)
1313-13-9
T
-
-
-
-
pg/L
62.1 J
49.5 J
-
0.74
-
Se IV
10102-18-8
T
-
-
-
-
pg/L
0.5 U
0.5 U
2 U
0.5 U
2 U
Se VI
13410-01-0
T
-
-
-
-
p /L
0.5U
0.5U
2U
0.5U
2U
Dissolved Oxygen
DO
N
-
-
-
-
mg/L
-
4.65
7.4
3.89
5.12
Temperature
TEMP
N
-
-
-
-
Deg C
29.7
18.5
23
18.6
pH
PH
N
1 6
1 9
1 6.5
1 8.5
1 SU
8.05
7.5
7.2
7.4
Turbidity, field
TURB
N
-
-
-
-
NTU
5.47
130.2
4.21
115.6
Specific Conductivity (field)
SC
N
-
-
-
PS/cm
170.3
269.9
287
257.1
Oxidation Reduction Potential
ORP
N
-
-
-
-
mV
200.3
101.5
102.3
-92.8
Notes:
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
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
GWOS = 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
Dan River Steam Station Ash Basin
Well ID / Sampling Location
Well Type
Well Screen
Length
(ft)
Approximate Well
Total Depth
(ft. bgs)
Top of
screen (ft.
bgs)
Bottom of
screen (ft. bgs)
GROUNDWATER
AB-5S
CSA
15
23
7
22
AB-5D
CSA
5
45
34
39
AB-10D
CSA
5
83
77
82
AB-10S
CSA
15
30.5
15
30
AB-10SL
CSA
5
50
43
48
AB-25BR
CSA
5
149
144
149
AB-25D
CSA
5
94
82
87
AB-25S
CSA
15
53.5
30
45
AB-30BR
CSA
5
115
109
114
AB-30D
CSA
5
63
54
59
AB-30S
CSA
15
31
15
30
AB-35BR
CSA
5
95
81
86
AS-2D
CSA
5
66
53
58
AS-4D
CSA
5
42
35
40
AS-6D
CSA
5
62
56
61
AS-8BR
CSA
5
111
64
69
AS-8D
CSA
4
61
48
52
AS-10D
CSA
5
83
38
43
AS-12S
CSA
10
28.9
13.9
23.9
BG-1 D
Background/CSA
5
22
9
14
BG-5D
Background/CSA
5
39.6
28
33
BG-5S
Background/CSA
10
23
10.5
20.5
GWA-1 D
CSA
5
120
114
119
GWA-1S
CSA
15
47
30
45
GWA-2D
CSA
5
69
56
61
GWA-2S
CSA
15
31.5
16
31
GWA-3D
CSA
5
41.6
34
39
GWA-3S
CSA
10
29
13.8
23.8
GWA-4D
CSA
5
56
43
48
GWA-4S
CSA
15
37
20
35
GWA-5BR
CSA
5
63.3
55
60
GWA-6D
CSA
5
43.6
29
34
GWA-6S
CSA
10
20
9
19
GWA-7D
CSA
5
56
46
51
GWA-7S
CSA
15
37.5
14
29
GWA-8D
CSA
5
45
35
40
GWA-8S
CSA
15
23
6
21
GWA-9D
Background - CSA
5
74
67
72
GWA-9S
Background - CSA
15
49
32
47
GWA-10D
CSA
5
45
33
38
GWA-10S
CSA
15
28
13
28
GWA-11 D
CSA
5
41.7
29.5
34.5
GWA-11S
CSA
15
26
10
25
GWA-12S
CSA/Background
10
16
6
16
GWA-12D
CSA/Background
5
32
27
32
GWA-14D
CSA
5
24
11.5
16.5
GWA-14S
CSA
5
9
3
8
GWA-15D
CSA
5
34.05
26
31
GWA-15S
CSA
5
13.5
7.5
12.5
MW-9
Voluntary
10
22.6
11.94
21.94
MW-9D
Voluntary
5
72
66.05
71.05
MW-10
Voluntary
10
21
10.8
20.8
MW-10D
Voluntary
5
73
67.55
72.55
MW-11
Voluntary
10
24
14.39
24.39
MW-11 D
Voluntary
5
56
50.82
55.82
MW-12
Voluntary
10
37
27.12
37.12
MW-12D
Voluntary
5
45
39.97
44.97
MW-20D
Compliance
5
44.2
39.2
44.2
MW-20S
Compliance
15
22.11
7.11
22.11
MW-21 D
Compliance
5
21
16.4
21.4
MW-21S
Compliance
5
12
6.56
11.56
MW-22D
Compliance
5
39.11
34.11
39.11
MW-22S
Compliance
10
24.86
14.86
24.86
MW-22BR
CSA
5
84.9
58
63
MW-23D
Background/Compliance
10
20.11
10.11
20.11
MW-23BR
Background/CSA
5
61
56
61
MW-301 BR
CSA
5
82.5
37
42
MW-308BR
CSA
5
88
77
82
MW-310BR
CSA
5
88
73
78
MW-311 BR
CSA
5
133.5
120
125
MW-314BR
CSA
5
99.1
69
74
MW-315BR
CSA
15
104.3
59.7
74.7
MW-317BR
CSA
5
109.8
83
88
MW-318D
CSA
5
50
44.5
49.5
OW-303D
Closure
5
88
83
88
OW-308D
Closure
10
15
5
15
OW-310D
Closure
5
24
19
24
Page 1 of 2

Table 9-1 Interim Monitoring Plan Sample Locations
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Well ID / Sampling Location
Well Type
Well Screen
Length
(ft)
Approximate Well
Total Depth
(ft. bgs)
Top of
screen (ft.
bgs)
Bottom of
screen (ft. bgs)
SURFACE WATER
SW-1
SW
NA
NA
NA
NA
SW-2
SW
NA
NA
NA
NA
SW-3
SW
NA
NA
NA
NA
SW-4
SW
NA
NA
NA
NA
SW-5
SW
NA
NA
NA
NA
SW-6
SW
NA
NA
NA
NA
SW-7
SW
NA
NA
NA
NA
SW-8
SW
NA
NA
NA
NA
SW-9
SW
NA
NA
NA
NA
SW-10
SW
NA
NA
NA
NA
SW-11
SW
NA
NA
NA
NA
SW-12
SW
NA
NA
NA
NA
SW-13
SW
I NA
NA
I NA
NA
AREAS OF WETNESS
S-1
SP
NA
NA
NA
NA
S-2
SP
NA
NA
NA
NA
S-3
SP
NA
NA
NA
NA
S-4
SP
NA
NA
NA
NA
S-6
SP
NA
NA
NA
NA
Page 2 of 2

Table 9-2 Sampling Parameters and Analytical Methods
Corrective Action Plan Part 2
Dan River 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, Manganese, Potassium (total only),
Sodium (total only), Strontium, Zinc
2 - 250 mL HDPE
Nitric Acid, Ice
EPA 200.8
Dissolved Metals - Antimony, Arsenic, Beryllium, Cadmium,
Chromium, Cobalt, Copper, Lead, Molybdenum, Nickel, Selenium,
Thallium, Vanadium
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
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