NC0003468_SARP_Rev0_Appendix D_Vol2_20161201

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 Namel10:
AB-30SR
AS-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
9/1012015
612412015
9111/2015
612912015
9110/2015
612512015
911012015
N
N
N
N
N
N
N
DR-AB-30BR-NS-36115
AB-30D
DR-AB-30D-NS-3015
AB-30S
DR-AB-30S-NS-3Q15
AB-35BR
DR-AB-35BR-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
1L
100 U
100 U
100 U
110
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
1L
270
94 J
250
130 J
3400
190
75 J
Antimony
D
7440-36-0
NS
1L
0.5 U
2
0.43 J
0.5 UJ
0.5 U
0.51
0.5 U
Antimony
T
744036--0
1
IMAC
p 1L
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
1L
0.78
0.46 J
0.35 J
0.5 UJ
0.5 U
12
9.3
Arsenic
T
7440-38-2
10
02L
p IL
0.94
0,41 J
0.41 J+
0.5 U
0.96
11.7
10.5 J
Barium
D
7440-39-3
NS
1L
110
82
91
120
110
210
370
Barium
T
7440-39-3
700
02L
IL
100
110
95
130
160
240
360
Beryllium
D
744041-7
NS
1L
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
p 1L
0,2 U
0,2 U
0.2 U
0,45
0.84
0,2 U
0.2 U
Boron
D
744042-8
NS
p 1L
310
240
290
300
320
270
220
Boron
T
7440-42-8
700
02L
p 1L
300
250
270
290
310
270
240
Cadmium
D
744043-9
NS
p 1L
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
fL
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
1L
70400
52300
57200
8580
5720
84300
79000
Chromium
D
7440-47-3
NS
IL
0,21 J
2 J+
0,75
0,78 J+
0.2 J
1.5 J+
0,55
Chromium
T
744047-3
10
02L
p IL
1.7
2.7
3.3
0.99 J+
10.4
3.8
2.3 J
Cobalt
D
7440-48-4
NS
IL
0.5 U
0,18 J
0,27 J
0.5 UJ
24.9
0,24 J
0.5 U
Cobalt
T
744048-4
1
IMAC
p IL
0.23 J
0.3 J
0.44 J
29
30.7
0.26 J
0.14 J
Copper
D
7440-50-8
NS
IL
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
IL
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
1L
94
50 U
50 J
39 J
33 J
50 U
50 U
Iron
T
7439-89-6
300
02L
p 1L
460
97
380
1101
4200
150
93 J
Lead
D
7439-92-1
NS
fL
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
1L
0.18
0.14
0.29
0.44 J+
5.1
0.16
0.12
Magnesium
T
7439-95-4
NS
IL
11900
7830
9230
5360
4040
14700
13000
Manganese
D
7439-96-5
NS
IL
400
280
380
1600
1400
390
150
Manganese
T
7439-96-5
50
02L
p 1L
380
430
360
1500
1100
410
220
Mercury
❑
7439-97-6
NS
1L
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
1L
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
1L
40
23.5 J+
20.5
15.8 J+
16.5 J+
20.2 J+
22.3 J
Molybdenum
D
7439-98-7
NS
IL
2,9
2.8
1.3
0.5 U
0.5 U
20
21,3
Molybdenum
T
7439-98-7
NS
p 1L
3.2
2.5
1.9
0.5 U
0.29 J
21.4
19.9 J
Nickel
D
7440-02-0
NS
1L
0,85
1.5 J+
13
0,38 J+
7.8
1.1 J+
0.77
Nickel
T
7440-02-0
100
02L
1L
1.8
1.9 J+
2.7
8.6 J+
11.7
IA J+
1.4 J
Potassium
T
7440-09-7
NS
1L
5000 U
5000 U
5000 U
5000 U
5000 U
13500
14200
Selenium
D
778249-2
NS
p 1L
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
p /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
1L
15900
13800
15400
29400
29600
34400
158000
Strontium
D
7440-24-6
NS
1L
870
340
420
150
150
550
730
Strontium
T
7440-24-6
NS
1L
770
400
450
150
110
650
690
Thallium
D
7440-28-0
NS
1L
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
p IL
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
IL
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
p 1L
0.67 J
0.86 J
1.1
1 U
18.3
1.8
1.8 J
Zinc
D
7440-66-6
NS
1L
10 U
3 J+
21
15 J+
58
4.4 J
10 U
Zinc
T
7440-66-6
1000
02L
p IL
20
4 J+
43
13 J+
32
9.6 J+
3.7 J
Total Dissolved Solids
N
TDS
500000
02L
p IL
377000
249000
304000
183000
174000
410000
9050001
Total Organic Carbon
N
TOC
NS
1L
21000
1000 U
1000 U
650 J
760 J
12900
198000 J
Total Suspended Solids
N
TSS
-
NS
1L
14300
2500 U
37600
2500 U
69400
13300
68000 J
Alkalinity, CO3
Ni
ALK-CO3
NS
p 1L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
1L
133000
90900
87800
6200
3600 J
187000
197000
Alkalinity, lab
N
ALK-LAB
NS
1L
133000
90900 J- 1
87800
6200
3600 J
187000
197000
Chloride
N
16887-00-6
250000
02L
IL
18000
22100
21900
10200
10400
18800
33600 J
Nitrite as N
N
14797-65-0
--
1000
02L
p 1L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
1L
20 U
13 J+
20 U
20 UJ
20 U
17 J+
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
106000
71500
79400
81500
74200
129000
195000 J
Sulfide
N
18496-25-8
NS
/L
100 U
100 U
100 U
100 U
100 U
100 U
6500 J-
As(III)
T
7784-46-5
NS
1L
0.158
0.2 U
9.84 J
As V
T
10103-60-3
NS
IL
0.12
0.2 U
0.66
Chromium VI
T
18540-29-9
0.07
DHHS
p 1L
1.38
0:026 J+
0,871 J
Fe II
T
1345-25-1
NS
1L
10.1
119
7,3 J+
Fe(Ill)
T
1309-37-1
NS
p 1L
20 U
20 U
20 UJ
Mn II
T
134443-0
NS
/L
292
1540
406 J+
Mn(IV)
T
1313-13-9
NS
IL
85.2
2.5 UJ
16.9 J+
IV
T
10102-18-8
NS
IL
0.5 U
0.5 U
0.5 U
rSe
Se i
T
13410-01-0
NS
p IL
0.5 U
0.5 U
0.5 UJ
Uranium, Natural
T
7440-61-1
NS
1L
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 Namel10:
AB-30SR
AS-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
9/1012015
612412015
9111/2015
612912015
9110/2015
612512015
911012015
N
N
N
N
N
N
N
DR-AB-30BR-NS-36115
AB-30D
DR-AB-30D-NS-3015
AB-30S
DR-AB-30S-NS-3Q15
AB-35BR
DR-AB-35BR-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
CiIL
Radium-228
T
15262-20-1
NS
pCi1L
Uranium-233
T
13968-55-3
NS
1L
Uranium-234
T
13966-29-5
NS
1L
Uranium-236
T
13982-70-2
NS
I
1L
❑ ssolved Oxygen
N
❑D
NS
mqjI
0.2
0.6
2.83
0.2
0,84
0.02
Temp Celsius
N
TEMP
--
NS
Deg C
26.8
23
21.9
25.3
28.9
32
H (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
Slcm
555
443.9
264.6
255
618
585
Oxidation Reduction. Potential
N
ORP
NS
mV
-90.6
-90.1
281.7
293.3
124.7
-214A
GW Depth TOC
N
IGW DEPTH-T00
NS
ft
Notes:
pg/L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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
TQC = 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-51)
MW-10
MW-10
MW-10D
MW-10D
MW-11
Round i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round i (CSA Sampling)
6/18/2015
9/9/2015
6/2512015
9/1112015
612412015
9111/2015
6129/2015
N
N
N
N
N
N
N
AB-5D
DWAS-SD-NS-3015
MW-10
DR-MW-10-NS-3415
MW-10D
DR-MW-10D-NS-3015
MW-11
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
1L
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
1L
62 J
180
100 J
100 U
100 U
160
Antimony
D
7440-36-0
NS
1L
0.5 U
0.5 U
0.5 J
0.5 U
0.5 U
0.5 U
Antimony
T
744036--0
1
1 IMAC
p 1L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
D
7440-38-2
NS
1L
8.8
14A
0.5 J
0.5 U
0.5 U
0.5 U
Arsenic
T
7440-38-2
10
02L
p 1L
1 8.5
13.9
0.5 U
0.5 U
0.5 U
0,14 J
Barium
D
7440-39-3
NS
1L
89
64
29
40
45
63
Barium
T
7440-39-3
700
02L
1L
89
67
32
45
46
72
Beryllium
D
744041-7
NS
1L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.42
Beryllium
T
7440-41-7
4
IMAC
p 1L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.5
Boron
D
744042-8
NS
p 1L
560
630
460
440
460
240
Boron
T
7440-42-8
700
1 02L
p 1L
500
650
460
460
440
230
Cadmium
D
744043-9
NS
p 1L
0.08 J
0.08 U
0,08 U
0.08 J
0.08 J
0.034 J
Cadmium
T
7440-43-9
2
02L
1L
0,08 U
0,08 U
0,08 U
0.08 U
0,08 U
0,038 J
Calcium
T
7440-70-2
NS
1L
34900 J-
40100
41000
33600
33200
2850
Chromium
D
7440-47-3
NS
1L
0.2 J+
0.5 U
3.6
0,28 J+
0.5 U
0.36 J+
Chromium
T
744047-3
10
02L
p IL
3.3
1.2
6.6
0.27 J
0,34 J
1.2 J+
Cobalt
D
7440-48-4
NS
1L
1.9
5A
0,19 J
0,59
0,59
28.5
Cobalt
T
744048-4
1
IMAC
p 1L
1
5.5
0.28 J
0.57
0.57
29.2
Copper
D
7440-50-8
NS
1L
0.25 J
0,24 J
1 U
1 U
12
0.54 J+
Copper
T
7440-50-8
1000
02L
IL
0,51 J
0,51 J
1 U
0.43 J
0.45 J+
2 J+
Iron
D
7439-89-6
NS
1L
63
1100
50 U
130
120
50 U
Iron
T
7439-89-6
300
02L
p 1L
140
1400
50 J
170
150
400
Lead
D
7439-92-1
NS
1L
0.1 U
0A8 J
0.1 U
0.1 U
0,88
0,09 J+
Lead
T
7439-92-1
15
02L
1L
0.058 J
0.12
0.1 U
0.048 J
0.063 J
1.2 J+
Magnesium
T
7439-95-4
NS
1L
7180
7270
13600
11000
11000
1810
Manganese
D
7439-96-5
NS
IL
1000
1300
5 U
990
950
890
Manganese
T
7439-96-5
5D
02L
p 1L
1000
1300
13
1000
930
880
Mercury
❑
7439-97-6
NS
1L
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
1L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 UJ
0.2 U
Methane
N
74-82-8
NS
p 1L
19.1 J+
83.8
1.5 J+
1.5 J+
13
10 UJ
1.6 J+
Molybdenum
D
7439-98-7
NS
1L
3.6
4.4
0.5 U
0.13 J
0.15 J
0.5 U
Molybdenum
T
7439-98-7
NS
p 1L
3.5
4.4
0.5 U
0.13 J
0.13 J
0.5 U
Nickel
D
7440-02-0
NS
1L
3 J+
7
1 A
2.1
1.9
5.5 J+
Nickel
T
7440-02-0
100
02L
1L
4.2
7.8
2
2A
1.7 J+
5.6 J+
Potassium
T
7440-09-7
NS
1L
13900
13300
5000 U
5000 U
5000 U
5000 U
Selenium
D
778249-2
NS
p 1L
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
p 1L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
1L
28400
32800
15800
17300
18200
19800
Strontium
D
7440-24-6
NS
1L
390
470
690
270
300
54
Strontium
T
7440-24-6
NS
1L
380
460
720
300
300
59
Thallium
D
7440-28-0
NS
1L
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
p IL
0.024 J
0.1 U
0.1 U
0.1 U
0.1 UJ
0.023 J
Vanadium
D
7440-62-2
NS
1L
1 U
1 U
1 U
1 U
1 U
0.46 J
Vanadium
T
7440-62-2
0.3
IMAC
p 1L
0.77 J
1 U
1 U
1 U
1 U
2.6
Zinc
D
7440-66-6
NS
1L
3.8 J
10 U
10 U
10 UJ
10 U
5.7 J+
Zinc
T
7440-66-6
1000
02L
p IL
5.6 J+
3.7 J
10 U
10 U
10 U
6.8 J+
Total Dissolved Solids
N
TDS
500000
02L
p 1L
247000
253000
233000
297000
214000
213000
118000
Total Organic Carbon
N
TOC
NS
p 1L
1000 J
590 J
1200
1400
510 J
30100
1400
Total Suspended Solids
N
TSS
-
NS
1L
5000
7400
5000 U
2500 U
3300
38300
Alkalinity, CO3
Ni
ALK-CO3
NS
1L
5000 J
5000 U
5000 U
5000 U
5000 J
5000 U
5000 J
Alkalinity, HCO3
N
ALK-HCO3
NS
1L
131000
129000
124000
135000
95300
89200
5000 U
Alkalinity, lab
N
ALK-LAB
NS
1L
131000
129000
124000
135000
95300
89200
5000 U
Chloride
N
16887-00-6
250000
02L
1L
15500
14200
20400
22700
24100
23200
6500
Nitrite as N
N
14797-65-0
--
1000
02L
p 1L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
1L
20 U
20 U
1500
640 J-
11 J
20 UJ
110 J+
Sulfate
N
14808-79-8
250000
02L
p IL
45200
55700
26800
28800
41300
42200
48100
Sulfide
N
18496-25-8
NS
1L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
1L
As V
T
10103-60-3
NS
1L
Chromium VI
T
18540-29-9
0.07
DHHS
p 1L
Fe II
T
1345-25-1
NS
1L
Fe(Ill)
T
1309-37-1
NS
p 1L
Mn II
T
134443-0
NS
1L
Mn(IV)
T
1313-13-9
NS
p 1L
Se IV
T
10102-18-8
NS
1L
Se I
T
13410-01-0
NS
p IL
Uranium, Natural
T
7440-61-1
NS
1L
0.?d7 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-51)
AB-51)
MW-10
MW-10
MW-10D
MW-10D
MWA1
Round i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round i (CSA Sampling)
6/18/2015
9/9/2015
6/2512015
9/1112015
612412015
9111/2015
6129/2015
N
N
N
N
N
N
N
AB-5D
DWAS-SD-NS-3015
MW-10
DR-MW-10-NS-3415
MW-10D
DR-MW-10D-NS-3015
MW-11
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCill-
1 UJ
Radium-228
T
15262-20-1
NS
pCi1L
3 U
Uranium-233
T
13968-55-3
NS
1L
0.05 U
Uranium-234
T
13966-29-5
NS
1L
0.05 U
Uranium-236
T
13982-70-2
NS
I
1L
0.05 U
❑ ssolved Oxygen
N
00
NS
mqjI
0.2
5A
1.74
0.62
3.61
Temp Celsius
N
TEMP
--
NS
Deg C
24.8
20.8
20.4
19.1
24.5
H((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
Slem
431,1
340
330
336
160.5
Oxidation Reduction. Potential
N
CRP
NS
mV
-33.1
119
163
80
398
GW Depth TOC
N
IGW DEPTH -TOO
NS
ft
1
13.28
1
18,3
50
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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 NamellD:
MW-11
MW-11D
MW-308SR
MW-308BR
MW-310BR
MW-310BR
MW-311t3R
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
6115/2015
9/9/2015
6/1612015
9/912015
6/29/2015
N
N
N
N
N
N
N
DR-MW-11-NS-3415
MW-11D
MW-308BR
DR-MW-308BR-NS-3015
MW-310SR
DR-MW-31OBR-NS-3015
MW-311BR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
/L
100 U
100 U
9.7 J+
100 U
5.7 J
100 U
100 U
Aluminum
T
7429-90-5
NS
/L
790
740
483
120
659
580
910
Antimony
D
7440-36-0
NS
/L
0.5 U
0.5 U
0.22 J
0.5 U
0.32 J
I A
0.22 J
Antimony
T
7440-36-0
1
IMAC
p /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
/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
p /L
0.5 U
0,25 J
1,8
0.79
1.3
2.5
0.32 J
Barium
D
7440-39-3
NS
/L
71
54
69
69
56
33
94
Barium
T
7440-39-3
700
02L
/L
81
54
76 i
69
57
46
110
Beryllium
D
744041-7
NS
/L
0,46
0.2 U
0.2 U 7
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p 1L
0,46
0.2 U
0.2 U
01 U
0.2 U
0.2 U
0,2 U
Boron
D
744042-8
NS
p /L
290
91
260 J+
440
31 J
49 J
700
Boron
T
7440-42-8
700
02L
p /L
280
87
260
360
35 J+
40 J
690
Cadmium
D
744043-9
NS
p /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
/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
/L
3270
62500
169000
232000
34700
26100
53400
Chromium
D
7440-47-3
NS
/L
0.24 J
1.1 J+
0.5 U
0,17 J
1.7 J+
0.63
0,37 J+
Chromium
T
744047-3
10
02L
p IL
0.58
1.5 J+
1.5
0.8
2.3
2.8
3.3 J+
Cobalt
D
7440-48-4
NS
/L
33.9
0,5 U
0.32 J
14,7
0.5 U
0,5 U
0,52
Cobalt
T
744048-4
1
IMAC
p /L
30.5
0.22 J
0.6
9.3
0.2 J
0.21 J
0.84
Copper
D
7440-50-8
NS
/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
IL
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
/L
50 U
50 U
1190
7600
50 U
50 U
380
Iron
T
7439-89-6
300
02L
p /L
1300
850
1910
5300
377
410
1200
Lead
D
7439-92-1
NS
/L
0.24
0.1 U.!
0.1 U
0.1 U
0,1 UJ
0.058 J
0.1 UJ
Lead
T
7439-92-1
15
02L
/L
0.32
0.29 J+
0.22 J+
0.16
0.88
1.1
0.53 J+
Magnesium
T
7439-95-4
NS
/L
2090
8020
28000
42800
6510
3980
11200
Manganese
D
7439-96-5
NS
IL
930
100
2000
7700
120
8.2
570
Manganese
T
7439-96-5
50
02L
p /L
910
130
2200
5400
110
37
680
Mercury
❑
7439-97-6
NS
/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
/L
0.2 UJ
0,2 U
0.2 UJ
02 U
0.082 J+
0,2 U
0,2 U
Methane
N
74-82-8
NS
/L
2.1 J+
7.6 J+
27
32.8
10 U
4.4 J+
8.5 J+
Molybdenum
D
7439-98-7
NS
WIL
0.5 U
3A
7,6
0.61
1.8
3.4
5
Molybdenum
T
7439-98-7
NS
p /L
0.5 U
2A
8.1
1.8
1.9
2.9
5
Nickel
D
7440-02-0
NS
/L
6
1A J+
0.98 J+
11.9
0,35 J+
1.1
2,9 J+
Nickel
T
7440-02-0
100
02L
/L
5.9
1 A J+
1.7 J+
8.2
0.88 J+
2.3
4 J+
Potassium
T
7440-09-7
NS
/L
5000 U
3050 J
5000 U
5000 U
5000 U
5000 U
5910
Selenium
D
778249-2
NS
p /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
p /L
0.5 U
0.5 U
0.5 U
0.5 U
021 J
0.41 J
0,5 U
Sodium
T
7440-23-5
NS
/L
21200
14000
20100
23300
21200
23600
23800
Strontium
D
7440-24-6
NS
/L
64
480
1200
2000
190
160
920
Strontium
T
7440-24-6
NS
/L
64
510
1300
1700
200
190
980
Thallium
D
7440-28-0
NS
/L
0.1 U
0.1 U
0.1 U
0.1 U
0,1 UJ
0.1 U
01 U
Thallium
T
7440-28-0
0.2
IMAC
p /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
WIL
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
p /L
0.58 J
1 U
0.84 J
1 U
2.5
3.7
0.89 J
Zinc
D
7440-66-6
NS
/L
15
10 UJ
9.8 J+
3,1 J
10 U
10 U
3.8 J+
Zinc
T
7440-66-6
1000
02L
p /L
6.5 J
4.6 J+
6.8 J+
31
5.7 J
6.7 J
15 J+
Total Dissolved Solids
N
TDS
500000
02L
p /L
143000
304000
844000
1300000
183000
161000
318000
Total Organic Carbon
N
TOC
NS
/L
1500
1000 U
610 J
1000 U
800 J
840 J
27400
Total Suspended Solids
N
TSS
-
NS
!L
1 11400
9200
19700
16400
36700
41400
55300
Alkalinity, CO3
Ni
ALK-CO3
NS
p /L
5000 U
5000 U
10000 U
5000 U
10000 U
8800
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
/L
5000 U
124000
170000
140000
110000
73700
154000
Alkalinity, lab
N
ALK-LAB
NS
/L
5000 U
124000
170000
140000
110000
82500
154000
Chloride
N
16887-00-6
250000
02L
1L
7600
23600
11600
13100
11600
12700
22000
Nitrite as N
N
14797-65-0
--
1000
02L
p /L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
/L
100 J-
65 J+
20 U
11 J
20 U
20 U
14 J+
Sulfate
N
14808-79-8
250000
02L
p /L
48600
70000
323000
586000
14100
18700
53000
Sulfide
N
18496-25-8
NS
/L
100 U
100 U
200 U
100 U
1000 U
100 U
100 U
As(III)
T
7784-46-5
NS
/L
As V
T
10103-60-3
NS
/L
Chromium VI
T
18540-29-9
0.07
DHHS
p /L
Fe II
T
1345-25-1
NS
/L
Fe(Ill)
T
1309-37-1
NS
p /L
Mn II
T
134443-0
NS
/L
Mn(IV)
T
1313-13-9
NS
p /L
Se IV
T
10102-18-8
NS
!L
Se l
T
13410-01-0
NS
p /L
Uranium, Natural
T
7440-61-1
NS
!L
1 0,397
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 NamellD:
MWA1
MW-11D
MW-308SR
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
6115/2015
9/9/2015
6/1612015
9/912015
6/29/2015
N
N
N
N
N
N
N
DR-MW-11-NS-3415
MW-11D
MW-308BR
DR-MW-308BR-NS-3015
MW-310SR
DR-MW-31OBR-NS-3015
MW-311BR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCill-
2.02
Radium-228
T
15262-20-1
NS
pCi1L
3 U
Uranium-233
T
13968-55-3
NS
1L
0.05 U
Uranium-234
T
13966-29-5
NS
1L
0,05 U
Uranium-236
T
13982-70-2
NS
!L
0.05 U
❑ ssolved Oxygen
N
00
NS
m 1I
0.06
2,24
0.49
0.2
0,28
0.9
0,77
Temp Celsius
N
TEMP
--
NS
Deg C
19.8
22
31A
22.3
32.8
25.2
24
H (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
5.45
6.2
9.92
9.1
39.18
Spec. Cond. field
N
SC
NS
S/cm
147
454A
1096
1628
283.9
241.3
505
Oxidation Reduction. Potential
N
CRP
NS
mV
185
132.5
-20.4
-89
121:6
75.8
-120.9
GW Depth TOC
N
IGW DEPTH -TOO
NS
ft
13.84
18.1
Notes:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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 Name11D:
MW-311BR
MW-314SR
MW-314BR
MW-9
MW-911)
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
6/2512015
9111/2015
6/3012015
6124/2015
9/11/2015
N
N
N
N
N
N
DR-MW-311BR-NS-3015
MW-3148R
DR-MW-314BR-NS-3015
MW-9
MW-9D
DR-MW-9D-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
1L
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
IL
560
350
120
250
2400
1300
Antimony
D
7440-36-0
NS
1L
0.5 U
0.53
1.3
0.5 U
0.5 U
0.5 U
Antimony
T
744036--0
1
1 IMAC
p 1L
0,5 U
0,47 J
1.6
0,5 U
0.5 U
0,27 J
Arsenic
D
7440-38-2
NS
1L
0.18 J
0.36 J
1.7
0.14 J
0.5 U
0.5 U
Arsenic
T
7440-38-2
10
02L
p 1L
0.5 U
0.3 J
1,8 J+
0.27 J
0,21 J
0,12 J+
Barium
D
7440-39-3
NS
1L
94
19
20
64
4 J
3.5 J
Barium
T
7440-39-3
700
02L
1L
110
24
25
70
19
22
Beryllium
D
744041-7
NS
1L
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
p 1L
01 U
0,2 U
0,2 U
0,21
0.19 J
0,1 J
Boron
D
744042-8
NS
p 1L
790
510
460
50 U
1000
1000
Boron
T
7440-42-8
700
02L
p 1L
810
500
490
28 J
1000
1100
Cadmium
D
744043-9
NS
p 1L
0.08 U
0,08 U
0,08 U
0.08 U
0,15
0.059 J
Cadmium
T
7440-43-9
2
02L
1L
0,08 U
0,08 U
0,03 J
0,031 J
1,8
0.12
Calcium
T
7440-70-2
NS
1L
53900
47400
48600
11400
21100
20800
Chromium
D
7440-47-3
NS
1L
0.25 J
0.87 J+
0.32 J
2,5
0,45 J+
0.58
Chromium
T
744047-3
10
02L
p IL
2.1
5
0.96 J+
1.8 J+
7.1
3.6
Cobalt
D
7440-48-4
NS
1L
0.13 J
0.5 U
0,5 U
5,6
0.28 J
0,37 J
Cobalt
T
744048-4
1
IMAC
p 1L
0.52
0.34 J
0.17 J
6.4
1.5
2.7
Copper
D
7440-50-8
NS
1L
1.1
2,1 J+
43
1 UJ
0.34 J
8.4
Copper
T
7440-50-8
1000
02L
IL
0.72 J
1.2 J+
0.79 J+
10.9
8.7
3.1 J+
Iron
D
7439-89-6
NS
1L
470
50 U
28 J
340
50 U
50 U
Iron
T
7439-89-6
300
02L
p 1L
1100
380
160
990
2600
1400
Lead
D
7439-92-1
NS
1L
0.25
0,1 U
0.77
0.1 U
0.1 U
0.92
Lead
T
7439-92-1
15
02L
1L
0.38
0.21
0.15
1.4
1.6
0.78
Magnesium
T
7439-95-4
NS
1L
11500
13400
12900
7310
9180
9190
Manganese
D
7439-96-5
NS
IL
510
15
70
1600
540
610
Manganese
T
7439-96-5
50
02L
p 1L
540
25
65
1000
600
1100
Mercury
❑
7439-97-6
NS
1L
0.2 U
0.23
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
1L
0.2 U
0,2 U
0.2 U
0.095 J
0.2 U
0.2 U
Methane
N
74-82-8
NS
1L
11.4
2.5 J+
18.3
1.6 J+
10 a
12.8 J+
Molybdenum
D
7439-98-7
NS
1L
0,6
0,72 J+
21
0.1 J
9,7
9A
Molybdenum
T
7439-98-7
NS
p 1L
0:63
0.91
2
0.5 U
10.1
9.4
Nickel
D
7440-02-0
NS
1L
2,6
1.2 J+
1,5
1.7
2.6
33
Nickel
T
7440-02-0
100
02L
1L
3.1
3.4 J+
1.9 J+
1.2 J+
5.2
4.2 J+
Potassium
T
7440-09-7
NS
1L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
778249-2
NS
p 1L
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
p 1L
0.5 U
0,5 U
0.5 U
0,5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
1L
16900
11400
13200
14300
25400
26800
Strontium
D
7440-24-6
NS
1L
920
160
170
120
100
130
Strontium
T
7440-24-6
NS
1L
930
160
170
130
120
140
Thallium
D
7440-28-0
NS
1L
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
p IL
0.1 U
0.016 J
0.045 J+
0.1 U
0.035 J
0.016 J+
Vanadium
D
7440-62-2
NS
1L
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
p 1L
0.62 J
1.3
0.82 J
2.3
11.1
2.7
Zinc
D
7440-66-6
NS
1L
10 U
10 U
5.9 J
8,5 J
10 UJ
10 U
Zinc
T
7440-66-6
1000
02L
p IL
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
p 1L
1 272000
261000
289000
113000
238000
213000
Total Organic Carbon
N
TOC
NS
1L
1000 U
1000 U
1000 U
1700
1000 U
1000 U
Total Suspended Solids
N
TSS
-
NS
1L
18500
12600
14500
2500 U
49000
264000
Alkalinity, CO3
Ni
ALK-CO3
NS
p 1L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
1L
127000
56700
60000
35200
32400
29600
Alkalinity, lab
N
ALK-LAB
NS
1L
127000
56700
60000
35200
32400
29600
Chloride
N
16887-00-6
250000
02L
WIL
23000
30500
30500
13000 J-
20000
19900
Nitrite as N
N
14797-65-0
--
1000
02L
p 1L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
1L
20 U
20 U
20 U
230
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
53800
95800
98200
36100
87300
91400
Sulfide
N
18496-25-8
NS
1L
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
1L
As V
T
10103-60-3
NS
1L
Chromium VI
T
18540-29-9
0.07
DHHS
p 1L
Fe II
T
1345-25-1
NS
1L
Fe(Ill)
T
1309-37-1
NS
p 1L
Mn II
T
134443-0
NS
/L
Mn(IV)
T
1313-13-9
NS
1L
IV
T
10102-18-8
NS
1L
re
e I
T
13410-01-0
NS
p IL
Uranium, Natural
T
7440-61-1
NS
1L
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 NameflD:
MW-311BR
MW-314SR
MW-314BR
MW-9
MW-91)
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
6/2512015
9111/2015
6/3012015
6124/2015
9/11/2015
N
N
N
N
N
N
DR-MW-311BR-NS-3015
MW-3148R
DR-MW-314BR-NS-3015
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
CiIL
Radium-228
T
15262-20-1
NS
pCi1L
Uranium-233
T
13968-55-3
NS
1L
Uranium-234
T
13966-29-5
NS
1L
Uranium-236
T
13982-70-2
NS
I
1L
Dissolved Oxygen
N
00
NS
m 1I
0.25
0.99
0,38
1,68
0.52
0,21
Temp Celsius
N
TEMP
--
NS
Deg C
18
26.7
21.6
21.7
20.8
22.8
H (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
Slcm
807
414.9
306.2
219A
324
228.9
Oxidation Reduction. Potential
N
CRP
NS
mV
-47.1
108.3
-129.3
179.9
145
110.8
GW Depth TOC
N
IGW DEPTH -TOO
NS
ft
45.1
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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
TQC = 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 NameIID:
AS-10D
AS-10D
AS-12D
AS-12S
AS-12S
AS-213
AS-2111)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
6/812015
9/812015
619/2015
619/2015
918/2015
6117/2015
91312015
N
N
N
N
N
N
N
AS-10D
DR-AS-10D-NS-3015
❑R AS-12D_WG_20150609
AS-12S
DR-AS-I2S-NS-3015
AS-21)
DR-AS-2D-NS-3015
Constituent
Fractlon
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
NIL
578
810
13A J+
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pqII.
730
920
554 J+
100 U
760
650
Antimony
D
7440-36-0
NS
pWL
2.7
3A
0,24 J
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
p IL
2.9
3.8
0,23 J
0.5 U
0.16 J
0,5 U
Arsenic
D
7440-38-2
NS
pqIL
8.5
7.6
0.48 J
0.23 J
0.24 J
0.17 J
Arsenic
T
7440-38-2
10
02L
p L
8,9
7,5
0.52
0.28 J
0.29 J
0.38 J
Barium
D
7440-39-3
NS
pqIL
30
16
33
31
120
170
Barium
T
7440-39-3
700
02L
pqIL
32
19
37
29
130
190
Beryllium
D
7440-41-7
NS
pqJL
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
p IL
0.2 U
0.2 U
0.2 U
0.2 U
0.096 J
0,1 J
Boron
D
7440-42-8
NS
p IL
50 U
26 J
1000
1300
150
360
Boron
T
7440-42-8
700
02L
p L
29 J
31 J
1000
1200
160
410
Cadmium
D
7440-43-9
NS
p IL
0,08 U
0:08 U
0.2
0,036 J
0.08 u
0.08 U
Cadmium
T
7440-43-9
2
02L
uQJL
1 0,08 U
0,08 U
0,19
0.04 J
0.041 J
0,08 U
Calcium
T
7440-70-2
NS
IL
65000
49900
40700
45900
72500
96600
Chromium
D
7440-47-3
NS
pqjL
2 J
2,2
0.22 J+
0,49 J
0,58
0.73
Chromium
T
744047-3
10
02L
NIL
2.4
2.9
1.1 J+
1.1 J+
1.4
2.3
Cobalt
D
7440-48.4
NS
pqjL
0,5 U
0.5 U
2
1.2
1,6
0,81
Cobalt
T
744048-4
1
IMAC
p IL
0.5 U
0.5 U
2.2
1.3
2.1
1.2
Copper
D
7440-50-8
NS
pqjL
0,76 J+
3,6
0.4 J+
6,8
0.76 J+
0.46 J
Copper
T
7440-50-8
1000
02L
IL
1.2 J+
2.1
1.1 J+
0.46 J
1 UJ
1.1
Iron
D
7439-89-6
NS
pqIL
50 U
50 U
82,6
370
1800
1800
Iron
T
7439-89-6
300
02L
p IL
35.6 J
69
928
450
2900
2800
Lead
D
7439-92-1
NS
qjL
0,077 J
0,69
0.1 U
0,51
0.1 U
0.17
Lead
T
7439-92-1
15
02L
p IL
0.1 U
0.095 J
0.5 J+
0.11
0.54
0.48
Magnesium
T
7439-95-4
NS
pqjL
59.2 J
100 U
30600
35700
16700
27400
Manganese
D
7439-96-5
NS
p IL
5 U
5 U
420
330
1500
1900
Manganese
T
7439-96-5
SO
02L
p L
5 U
3A J
430
320
1500
2100
Mercury
D
7439-97-6
NS
p IL
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
pqJL
0.2 U
0.2 U
0.12 J
0.2 U
0.085 J+
0,2 U
Methane
N
74-82-8
NS
p IL
10 U
14.4 J+
10 U
9.4 J+
10 U
5.8 J+
Molybdenum
D
7439-98-7
NS
pqjL
3,8
4,5
2.8
0.59
1
0.84
Molybdenum
T
7439-98-7
NS
p IL
3.9
4.7
2.5
0,64
1
0.86
Nickel
D
7440-02-0
NS
pqIL
0.5 U
0.4 J
9,6
5,7
1.8 J+
1.6
Nickel
T
7440-02-0
100
02L
pqIL
0.23 J
0.92
9.8
5A
2.8 J+
2.4
Potassium
T
7440-09-7
NS
IL
5000 U
4210 J
5000 U
5000 U
3120 J
5000 U
Selenium
D
7782-49-2
NS
p IL
28.8
31.3
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
p IL
35.3
31
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
p iL
9700
11800
29000
33600
29700
26600
Strontium
D
7440-24-6
NS
pqIL
320
300
600
700
510
630
Strontium
T
7440-24-6
NS
pgYL
350
350
600
660
530
700
Thallium
D
7440-28-0
NS
pqjL
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
p IL
0.1 U
0.1 U
0.1 U
0.1 U
0.061 J
0.023 J+
Vanadium
D
7440-62-2
NS
pqjL
13.3
30.6
0.29 J
0.32 J
0.32 J
1 U
Vanadium
T
7440-62-2
0.3
IMAC
NIL
15.3
30.6
1.1
0.52 J
1.6
1.4
Zinc
D
7440-66-6
NS
pqIL
t0 U
3.3 J
10 U
27
8A J
2,7 J
Zinc
T
7440-66-6
1000
02L
p IL
5A J+
6.3 J
4,2 J+
43
16 J+
4.8 J
Total Dissolved Solids
N
TDS
500000
02L
p L
220000 J-
202000
350000
321000
405000
498000
Total Organic Carbon
N
TOC
NS
pqIL
1000 U
1600
1600
1500
1500
1200
Total Suspended Solids
N
TSS
NS
IL
1100
5000 U
89000
2500 U
189000
133000
Alkalinity, CO3
N
ALK-CO3
NS
p IL
63000
54900
10000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pQJL
23000
5000 U
190000
192000
170000
224000
Alkalinity, lab
N
ALK-LAB
-
NS
pqJL
100000
77200
190000
192000
170000
224000
Chloride
N
16887-00-6
250000
02L
PQJL
20300
19700
18700
21400
16900
17100
Nitrite as N
N
14797-65-0
1000
02L
L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
uWL
20 U
20 U
32
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
43900
43800
71700
83100 J-
90600
135000
Sulfide
N
18496-25-8
NS
IL
100 U
100 U
200 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pqjL
As V
T
10103-60-3
NS
pqjL
Chromium VI
T
18540-29-9
0.07
❑HHS
pq1L
Fe II
T
1345-25-1
NS
pqIL
Fe(Ill)
T
1309-37-1
NS
p IL
Mn II
T
1344-43-0
NS
piplL
Mn(IV)
T
1313-13-9
NS
pqJL
Se IV
T
10102-18-8
NS
/L
Se I
T
13410-01-0
NS
L
Uranium, Natural
T
7440-61-1
NS
pqIL
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 Name11D:
AS-10D
AS-10D
AS-12D
AS-12S
AS-12S
AS-213
AS-2D
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
6/812015
9/812015
619/2015
619/2015
918/2015
6117/2015
91312015
N
N
N
N
N
N
N
AS-10D
DR-AS-10D-NS-3015
❑R AS-12D_WG_20150609
AS-12S
DR-AS-I2S-NS-3015
AS-21)
DR-AS-2D-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi1L
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u 11
Uranium-234
T
13966-29-5
NS
u 1l
Uranium-236
T
13982-70-2
NS
ugh
❑ ssolved Oxygen
N
DO
NS
m 1L
2.38
2.2
1.29
025
0.12
Temp Celsius
N
TEMP
NS
Deg C
27.5
24.9
30.1
242
24.4
H (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
926
1.47
6.12
Spec. Cond. field
N
SC
NSPS/cm
582
3B8.5
606
643
553
Oxidation Reduction. Potential
N
ORP
NS
mV
104
-21.7
222.2
167.6
-180.9
GW Depth OC
N
JGW DEPTH-T{]
NS
I
I ft
26A2
18,43
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCVL = 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-41D
AS-4D
AS-41)
AS-61)
AS-6D
AS-88R
AS-8BR
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 GSA Sampling)
Round 2 3Q-2015
61512015
6126/2015
9/312015
618/2015
918/2015
6/9/2015
918/2015
N
N
N
N
N
N
N
AS-41)
AS-4111)
DR-AS-4D-NS-3015
AS-61)
DR-AS-6D-NS-3Q15
AS-8BR
DR-AS-BBR-NS-3Q15
Constituent
Fractlon
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
NIL
5.1 J
98 J
7.8 J
100 U
13.3 J+
100 U
Aluminum
T
7429-90-5
NS
pqIL
2990
1001
206
110
331 J+
100 U
Antimony
D
7440-36-0
NS
pWL
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
p IL
0,5 U
0,5 U
0.24 J
0,5 U
0.21 J
0.5 U
Arsenic
D
7440-38-2
NS
IL
1.5
1.5
1.5
0.86
0.16 J
0.5 U
Arsenic
T
7440-3B-2
10
02L
p L
1,8
1,6
2
0.88
0.34 J
0.12 J
Barium
D
7440-39-3
NS
pqIL
86
88
43
42
78
77
Barium
T
7440-39-3
700
02L
pqIL
97
100
45
49
95
86
Beryllium
D
7440-41-7
NS
pqJL
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
p IL
0,18 J
0,2 U
0.2 U
0.2 U
0.2 U
0,2 U
Boron
D
7440-42-8
NS
p IL
730
800
33 J
50 U
33 J
50 U
Boron
T
7440-42-8
700
02L
p L
810
930
37 J
25 J
45 J
50 U
Cadmium
D
7440-43-9
NS
p IL
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
uQJL
1 0,08 U
0.08 U
0,08 U
0,08 U
0,08 U
0,08 U
Calcium
T
7440-70-2
NS
IL
72800
88700
16300
18000
84600
66600
Chromium
D
7440-47-3
NS
pqjL
0,2 J+
0.19 J+
0.24 J
0.32 J
IA J+
0.3 J
Chromium
T
7440-47-3
10
02L
p IL
3.3
0.91 J+
0.47 J
1.9 J+
4.4
0.5 UJ
Cobalt
D
7440-48.4
NS
pqjL
2A
2.7
1A
0.59
0,5 U
0,5 U
Cobalt
T
7440484
1
IMAC
p IL
4
2.9
1.1
0.7
0.15 J
0.5 U
Copper
D
7440-50-8
NS
pqjL
1 UJ
1 UJ
1 U
0.78 J
1 U
1 U
Copper
T
7440-50-8
1000
02L
IL
3.6 J+
1 U
0.54 J+
0.84 J+
0,88 J
0.25 J+
Iron
D
7439-89-6
NS
pqIL
1 158
170
2880
3100
206
150
Iron
T
7439-89-6
300
02L
p 1L
4480
250 J+
3920
3400
466
170 J+
Lead
D
7439-92-1
NS
pqIL
0,089 J
0,059 J+
0.1 U
0.14
0,048 J+
0.1 U
Lead
T
7439-92-1
15
02L
p IL
1.7
0.28 J
0.087 J
0.24 J+
0.19 J+
0.1 U
Magnesium
T
7439-95-4
NS
pqjL
37500
44600
20300
26300
10800
11600
Manganese
D
7439-96-5
NS
p IL
700
770
260
220
790
920
Manganese
T
7439-96-5
SO
02L
p L
770
870
270
250
910
950
Mercury
D
7439-97-6
NS
p JL
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
uWL
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0,2 U
Methane
N
74-82-8
NS
p IL
41
221 J
68
106
20
15.6 J+
Molybdenum
D
7439-98-7
NS
pqjL
6,8
7,6
0.64
0.15 J
1 A J+
0.13 J
Molybdenum
T
7439-98-7
NS
p IL
7.2
7.8
0.35 J
0.2 J
1.8
0.14 J
Nickel
D
7440-02-0
NS
pqIL
2.1
2.5 J+
1.5 J
0.88
0,85 J+
0,34 J
Nickel
T
7440-02-0
100
02L
1L
5.2 J+
3
1,5
1.3 J+
1.2 J+
0.33 J+
Potassium
T
7440-09-7
NS
/L
2600 J
2770 J
5000 U
5000 U
4810 J
5000 U
Selenium
D
7782-49-2
NS
p IL
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
p IL
0.5 U
0.5 U
0.5 U
0,5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
p IL
22300
26100
20400
22800
14000
13000
Strontium
D
7440-24-6
NS
pqIL
920
970
150
150
400
380
Strontium
T
7440-24-6
NS
IL
980
1100
160
180
440
440
Thallium
D
7440-28-0
NS
pqjL
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
p IL
0.034 J
0.022 J+
0.1 U
0.1 U
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pqjL
1 U
1 U
1 U
1 U
1.4
1 U
Vanadium
T
7440-62-2
0.3
IMAC
NIL
4.8
1 U
0.69 J+
0.4 J
2.7
1 U
Zinc
D
7440-66-6
NS
pqIL
7,5 J
10 UJ
7.3 J
12
10 U
10 U
Zinc
T
7440-66-6
1000
02L
p IL
2.6 J+
10 U
12 J+
18
4.5 J+
10 U
Total Dissolved Solids
N
TDS
500000
02L
p L
410000 J-
432000
220000 J-
237000
370000
314000
Total Organic Carbon
N
TOC
NS
1L
1200
1200
640 J
2000 U
1000 U
1000 U
Total Suspended Solids
N
TSS
NS
/L
90000
47400
5500
12900
38000
2500 U
Alkalinity, CO3
N
ALK-CO3
NS
p IL
10000 U
5000 U
10000 U
5000'U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pQJL
310000
336000 J
140000
152000
150000
158000
Alkalinity, lab
N
ALK-LAB
-
NS
pqJL
310000
336000 J
140000
152000
150000
158000 J+
Chloride
N
16887-00-6
250000
02L
PQJL
21900
22400
16300
16500
8200
4800
Nitrite as N
N
14797-65-0
1000
02L
L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pqIL
20 U
20 U
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p 1L
44900
49400
15100
15600
74500
59700
Sulfide
N
19496-25-8
NS
IL
500 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
p IL
1.41
As V
T
10103-60-3
NS
pqjL
0.2 U
Chromium VI
T
18540-29-9
0.07
❑HHS
pq1L
0.007 J+
Fe II
T
1345-25-1
NS
pqIL
14B
Fe(Ill)
T
1309-37-1
NS
p JL
20 U
Mn II
T
1344-43-0
NS
L
951
Mn(IV)
T
1313-13-9
NS
pqJL
1 UJ
Se IV
T
10102-18-8
NS
/L
0,5 U
Se I
T
13410-01-0
NS
L
0.5 U
Uranium, Natural
T
1 7440-61-1
NS
pqIL
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 Name11D:
AS-41)
AS-4D
AS-41)
AS-61)
AS-6D
AS-88R
AS-8BR
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 GSA Sampling)
Round 2 3Q-2015
61512015
6126/2015
9/312015
618/2015
918/2015
6/9/2015
918/2015
N
N
N
N
N
N
N
AS-41)
AS-4D
DR-AS-4D-NS-3015
AS-61)
DR-AS-6D-NS-3Q15
AS-8BR
DR-AS-88R-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi1L
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u 11
Uranium-234
T
13966-29-5
NS
u 1l
Uranium-236
T
13982-70-2
NS
ugh
❑ ssolved Oxygen
N
DO
NS
m 1L
0.36
0.43
0.41
1,46
0,31
Temp Celsius
N
TEMP
NS
Deg C
25.2
27.8
24.8
24.6
19.8
H (field)
N
PH
6.5
8.5
02L
Su
6.24
6.02
6
7,09
T07
Turbidity. field
N
TURB
--
NS
NTU
7.49
9.3
8.32
51.38
0.88
Spec. Cond. (fieldl
SC
NS
S1cm
744
380.8
420.E
496.5
458
Oxidation Reduction. Potential
N
ORP
NS
mV
169.5
113.2
29.9
20
-59.4
GW Depth OC
N
JGW DEPTH -TO
--
NS
I ft
36.5
37,97
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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

Corrective Action Plan Part 2
Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name11D:
AS -OD
AS -OD
AS-$D
MW-301BR
MW-3018R
MW-3038R
MW-303RR
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)
612I2015
6126/2015
9/912015
6/11/2015
9/412015
611212015
6/2212015
N
N
N
N
N
N
N
AS-813
AS-8111]
DR-AS-8D-NS-3015
MW-301BR
DR-MW-301BR-NS-3015
MW-3038R
MW-303SR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
NIL
7 J
100 U
5.9 J
100 U
4.7 J
Aluminum
T
7429-90-5
NS
pqIL
1530
62 J
202
230 J'+
938
Antimony
D
7440-36-0
NS
pWL
1 UJ
0.5 U
0.5 U
0.5 U
0.16 J
Antimony
T
7440-36-0
1
IMAC
p IL
1 UJ
0.5 U
0,16 J
0,5 U
0,25 J
Arsenic
D
7440-38-2
NS
pqIL
1.2 J
0.41 J
0.84
0.64
6.4
Arsenic
T
7440-38-2
10
02L
p L
1,24 J
038 J
0,9
0,58
8,6
Barium
D
7440-39-3
NS
pqIL
64
69
33
21
69
Barium
T
7440-39-3
700
02L
pqIL
82
71
35
26
94
Beryllium
D
7440-41-7
NS
pqJL
1 UJ
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
1 UJ
0.2 U
0,2 U
0.2 U
0,2 UJ
Boron
D
7440-42-8
NS
p IL
50 UJ
50 U
50 U
50 U
50 U'
Boron
T
7440-42-8
700
02L
p L
50 UJ
50 U
50 U
50 U
29 J+
Cadmium
D
7440-43-9
NS
p IL
1 UJ
0,08 U
0.08 U
0:08 U
0,08 U
Cadmium
T
7440-43-9
2
02L
uQJL
1 UJ
0,08 UJ
0,08 U
0.08 U
0,08 U
Calcium
T
7440-70-2
NS
IL
47000
46700
43100
30200
34700
Chromium
D
7440-47-3
NS
pqjL
1 UJ
0.54
44
0,32 J
0,27 J
Chromium
T
744047-3
10
02L
NIL
1.9 J
0.25 J+
1.2 J+
1 J+
6.4
Cobalt
0
7440-48.4
NS
pqjL
1 UJ
0.5 U
0,19 J
0,16 J
0.18 J
Cobalt
T
744048-4
1
IMAC
p IL
1 UJ
0.5 U
0.26 J
0.24 J+
0.95
Copper
D
7440-50-8
NS
PQjL
1 UJ
1 U
1 U
1A
1 U
Copper
T
7440-50-8
1000
02L
IL
1 UJ
1 UJ
0.4 J
0.4 J
3.2 J+
Iron
D
7439-89-6
NS
pqIL
1160
700
146
330
2260
Iron
T
7439-89-6
300
02L
p IL
2900
890
383 J+
690 J+
2760
Lead
0
7439-92-1
NS
qjL
1 UJ
0.1 U
0.1 U
0.13
0.1 U
Lead
T
7439-92-1
15
02L
p IL
1 UJ
0.1 UJ
0.14 J+
0.18
1.2
Magnesium
T
7439-95-4
NS
pqjL
11300
12300
8200
7900
9480
Manganese
D
7439-96-5
NS
p IL
1100
1000
400
410
510
Manganese
T
7439-96-5
SO
02L
p L
1140
1000
410
400 J+
500
Mercury
D
7439-97-6
NS
p JL
0.05 U
0.2 U
0.2 U
0.2 U
0.2 U
Cu
T
7439-97-6
1
02L
L
0.05 U
0.2 U
0.2 U
0.2 U
0,2 U
Methane
N
74-82-8
NS
uo1L
10 U
24.5 J+
10 U
5.1 J+
10.2 J+
Molybdenum
0
7439-98-7
NS
pqjL
1 UJ
0,13 J
1,2
0,71
1,5
Molybdenum
T
7439-98-7
NS
p IL
1 UJ
0.16 J
1.3
0.69
2.1
Nickel
D
7440-02-0
NS
pqIL
1 UJ
033 J
2.4 J+
038 J
0.51 J+
Nickel
T
7440-02-0
100
02L
pqIL
1.59 J
0.28 J+
0.93 J+
0.68
4.8 J+
Potassium
T
7440-09-7
NS
1L
1810
5000 U
5000 U
5000 U
3420 J
Selenium
D
7782-49-2
NS
p IL
1 UJ
0.5 U
0.32 J
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
p IL
1 UJ
0,5 U
0,39 J
0,5 U
0,33 J
Sodium
T
7440-23-5
NS
p iL
15700
14500
10600
9730
17400
Strontium
D
7440-24-6
NS
pqIL
320
310
370
280
170
Strontium
T
7440-24-6
NS
pgYL
330
320
380
290
190
Thallium
D
7440-28-0
NS
pqjL
0.2 UJ
0.1 U
0.1 U
0.1 U
0,017 J
Thallium
T
7440-28-0
0.2
IMAC
p IL
0.2 UJ
0.1 U
0.035 J
0.02 J
0.056 J
Vanadium
D
7440-62-2
NS
pQJL
0.3 UJ
1 U
1.5
0.4 J
0.39.E
Vanadium
T
74,40-62-2
0.3
IMAC
NIL
1.88 J
1 U
1.8
0.811
3.7
Zinc
D
7440-66-6
NS
pqIL
12 J
10 U
IOU
13 J+
8.4 J
Zinc
T
7440-66-6
1000
02L
p IL
7 J
10 UJ
3.7 J
3 J
16
Total Dissolved Solids
N
TDS
500000
02L
p L
250000
236000
210000
215000 J+
272000
Total Organic Carbon
N
TOC
NS
pqIL
523
610 J
540 J
1000 U
760 J
Total Suspended Solids
N
TSS
NS
1L
38000
5000 U
9100
18200
13000 J
Alkalinity, CO3
N
ALK-CO3
NS
p IL
10000 U
5000 U
10000 U
5000 U
10000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pQJL
170000
160000
150000
108000
140000
Alkalinity, lab
N
ALK-LAB
-
NS
pqJL
170000
160000
150000
108000
140000
Chloride
N
16887-00-6
250000
02L
pqjL
6800
6600
4400
4200
8300
Nitrite as N
N
14797-65-0
1000
02L
L
10 UJ
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pqIL
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
25000
20600
3300
2400
14900
Sulfide
N
19496-25-8
NS
JL
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pqjL
0.593
As V
T
10103-60-3
NS
pqjL
0.2 U
Chromium VI
T
18540-29-9
0.07
❑HHS
p L
0.008 J+
Fe II
T
1345-25-1
NS
pqIL
974
Fe(Ill)
T
1309-37-1
NS
p JL
28300
Mn II
T
1344-43-0
NS
piplL
1210
Mn(IV)
T
1313-13-9
NS
pqJL
6A6
Se IV
T
10102-18-8
NS
pqjL
0.5 U
Se(VI)
T
13410-01-0
NS
L
0.5 U
Uranium, Natural
T
7440-61-1
NS
ijQIL
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 Name11D:
AS-81)
AS-8D
AS-$D
MW-301BR
MW-3018R
MW-3038R
MW-303RR
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)
61212015
6126/2015
9/912015
6/11/2015
9/412015
611212015
6/2212015
N
N
N
N
N
N
N
AS-813
AS-8D
DR-AS-8D-NS-3015
MW-301BR
DR-MW-301SR-NS-3015
MW-3038R
MW-303SR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi1L
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u 11
Uranium-234
T
13966-29-5
NS
u 1l
Uranium-236
T
13982-70-2
NS
ugh
❑ ssolved Oxygen
N
DO
NS
m 1L
0.35
0,26
0.51
0,27
Temp Celsius
N
TEMP
NS
Deg C
24.1
22.3
32A
32.7
H (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. (fieldl
SC
NS
PSI=
411.6
371
337.E
282.8
Oxidation Reduction. Potential
N
ORP
NS
mV
38.5
-35.7
44
26.2
GW Depth OC
N
JGW DEPTH -TO
NS
I ft
38.65
Notes:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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
TQC = 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 Name11D:
MW-3038R
MW-306BR
MW-306SR
MW-306SR
MW-3158R
MW-3156R
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
91412015
6/12/2015
6/22/2015
914/2015
6/19/2015
9/8/2015
N
N
N
N
N
N
DR-MW-303BR-NS-3015
MW-306BR
MW-306BR
DR-MW-306BR-NS-3015
MW-3158R
DR-MW-315BR-NS-3015
Constituent
Fractlon
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
NIL
100 U
7.9 J
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pqIL
660 J+
96.2 J-
600
790
100 U
Antimony
D
7440-36-0
NS
pWL
0,36 J
0.43 J
0.5 U
0.29 J+
0.5 U
Antimony
T
7440-36-0
1
IMAC
p IL
0.95
0,38 J
0.2 J
0.21 J
0,5 U
Arsenic
D
7440-38-2
NS
pqIL
2.5
1.1
0.9
0.16 J
0,18 J
Arsenic
T
7440-38-2
10
02L
p L
4,5
1
1
0.19 J
0.33 J
Barium
D
7440-39-3
NS
pqIL
71
150
140
58
59
Barium
T
7440-39-3
700
02L
pqIL
94
150
160
71
22
Beryllium
D
7440-41-7
NS
pqJL
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
0,095 J
0.2 U
0,2 U
0,2 U
0.16 J
Boron
D
7440-42-8
NS
p IL
50 U
940
1500
50 U
50 U
Boron
T
7440-42-8
700
02L
p L
50 U
920
1700
50 U
50 U
Cadmium
D
7440-43-9
NS
p IL
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
uQJL
1 0.08 U
0.08 U
0.08 U
0,08 U
0.029 J
Calcium
T
7440-70-2
NS
IL
38600
91500
143000
40200
48400
Chromium
D
7440-47-3
NS
pqjL
0.28 J
0,31 J
0,29 J
0.32 J+
0,19 J
Chromium
T
744047-3
10
02L
NIL
7.2
1 A J+
3.2 J+
24.8
6
Cobalt
D
7440-48.4
NS
pqjL
0,13 J
0,45 J
1,2
1.2 J+
0,48 J
Cobalt
T
744048-4
1
IMAC
p IL
0.46 J+
0.5 U
IA
2.2
2.6
Copper
D
7440-50-8
NS
PQjL
5,5
1 U
0,8 J+
1 U
1 U
Copper
T
7440-50-8
1000
02L
IL
28.3
1 U
1.4 J+
2.4
5.2 J+
Iron
D
7439-89-6
NS
pqIL
2200
582
3100
86
39 J
Iron
T
7439-89-6
300
02L
p IL
3400 J+
623 J
4000
1300
27 J
Lead
D
7439-92-1
NS
pqIL
0,28
0.1 U
0,065 J
0.1 U
0.11
Lead
T
7439-92-1
15
02L
p IL
0.68
0.095 J
0.43
0.81
1 A
Magnesium
T
7439-95-4
NS
pqjL
12200
26600
57900
22600
14900
Manganese
D
7439-96-5
NS
p IL
530
930
2200
1500
1100
Manganese
T
7439-96-5
SO
02L
p L
590 J+
920
2400
181i0
2,6 J+
Mercury
D
7439-97-6
NS
p JL
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pqJL
0.2 U
02 U
0.2 U
0,2 U
0.2 U
Methane
N
74-82-8
NS
p IL
13A J+
20.4 J+
10 UIJ
10.9 J+
4.6 J+
Molybdenum
D
7439-98-7
NS
pqjL
2,1
2.3
4.5
0,36 J+
0,21 J
Molybdenum
T
7439-98-7
NS
p IL
2.6
1.9
4.3
0.94
0,28 J
Nickel
D
7440-02-0
NS
pqIL
3
2 J+
3.5
1.2 J+
0.78
Nickel
T
7440-02-0
100
02L
pqIL
5
2.2 J+
4.1
16A
5.3
Potassium
T
7440-09-7
NS
IL
3740 J
4290 J
2970 J
5000 U
5000 U
Selenium
D
7782-49-2
NS
p IL
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
p IL
0,2 J
0.5 U
0,22 J
0,5 U
0.5 U
Sodium
T
7440-23-5
NS
p iL
19200
24200
32900
22100
15000
Strontium
D
7440-24-6
NS
pqIL
180
730
1200
420
460
Strontium
T
7440-24-6
NS
pgYL
210
740
1400
460
63
Thallium
D
7440-28-0
NS
pqjL
0.1 U
0.1 U
0.1 U
0,1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
p IL
0.018 J
0.1 U
0,018 J
0:024 J
0.028 J
Vanadium
D
7440-62-2
NS
pqjL
0,28 J
1.5
1 U
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
NIL
2
1.6
1.6
1.4
5.5
Zinc
D
7440-66-6
NS
pqIL
9 J+
2.5 J
19 J+
130
2.8 J
Zinc
T
7440-66-6
1000
02L
p IL
16
51
38
13
4.5 J
Total Dissolved Solids
N
TDS
500000
02L
p L
260000 J+
530000
778000 J+
277000
228000
Total Organic Carbon
N
TOC
NS
pqIL
580 J
900 J
530 J
810 J
1000 U
Total Suspended Solids
N
TSS
NS
IL
31200
6300 J
14100
222000
63600
Alkalinity, CO3
N
ALK-CO3
NS
p IL
5000 U
10000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pQJL
145000
160000
190000
176000
148000
Alkalinity, lab
N
ALK-LAB
-
NS
pqJL
145000
160000
190000 J-
176000
148000
Chloride
N
16887-00-6
250000
02L
pqjL
9700
21600
29700
10400
5600
Nitrite as N
N
14797-65-0
1000
02L
L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pqIL
20 U
20 U
20 UJ
20 U
20 UJ
Sulfate
N
14808-79-8
250000
02L
p IL
16700
187000
345000
38400
39500
Sulfide
N
18496-25-8
NS
7L
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pqjL
As V
T
10103-60-3
NS
pqjL
Chromium VI
T
18540-29-9
0.07
❑HHS
pq1L
Fe II
T
1345-25-1
NS
pqIL
Fe(Ill)
T
1309-37-1
NS
p JL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
pqJL
Se IV
T
10102-18-8
NS
/L
Se I
T
13410-01-0
NS
L
Uranium, Natural
T
7440-61-1
NS
pqIL
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 Name11D:
MW-3038R
MW-306BR
MW-306SR
MW-306SR
MW-3158R
MW-3156R
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
91412015
6/12/2015
6/22/2015
914/2015
6/19/2015
9/8/2015
N
N
N
N
N
N
DR-MW-303BR-NS-3015
MW-306BR
MW-306BR
DR-MW-306BR-NS-3015
MW-3158R
DR-MW-315BR-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
Ci/L
Uranium-233
T
13968-55-3
NS
u !I
Uranium-234
T
13966-29-5
NS
u 1l
Uranium-236
T
13982-70-2
NS
ugh
❑ ssolved Oxygen
N
DO
NS
m 1L
0.48
2,51
0.63
Temp Celsius
N
TEMP
NS
Deg C
29.4
19.5
30
H (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. (fieldl
SC
NS
PSI=
727
368
385,3
Oxidation Reduction. Potential
N
ORP
NS
mV
3.3
-24.9
23
GW Depth OC
N
JGW DEPTH -TO
NS
ft
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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
TQC = 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 Name11D:
MW-317BR
MW-3181)
MW-318D
OW-303D
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 2 3Q-2015
6/512015
61212015
9/912015
9/12/2015
N
N
N
N
MW-317BR
MW-3180
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
NIL
520
21 J
100 U
100 U
Aluminum
T
7429-90-5
NS
pqIL
649
510
120
7400
Antimony
D
7440-36-0
NS
pWL
1
1 UJ
0.5 U
2
Antimony
T
7440-36-0
1
IMAC
p IL
2.1
1 UJ
0,5 U
2.9
Arsenic
D
7440-38-2
NS
IL
0.63
1 UJ
1
40.2
Arsenic
T
7440-38-2
10
02L
p L
0,71
1 UJ
0,93
55
Barium
D
7440-39-3
NS
pqIL
46
35 J
34
210
Barium
T
7440-39-3
700
02L
pqIL
58
41 J
37
320
Beryllium
D
7440-41-7
NS
pqJL
0,2'U
1 UJ
0.31
0,11 J
Beryllium
T
7440-41-7
4
IMAC
p IL
0.2 U
1 UJ
0,31
2,1
Boron
D
7440-42-5
NS
p IL
s0 U
1250
1300
1200
Boron
T
7440-42-8
700
02L
p L
44 J
1310
1300
1000
Cadmium
D
7440-43-9
NS
p IL
0,08 U
1 UJ
0.068 J
0,44
Cadmium
T
7440-43-9
2
02L
pqjL
0,08 U
1 UJ
0,068 J
0,65
Calcium
T
7440-70-2
NS
IL
107000
21100
24900
52800 J-
Chromium
D
7440-47-3
NS
pqjL
8,4
1 UJ
0.38 J
0.27 J+
Chromium
T
744047-3
10
02L
NIL
11
2.8 J
0.69 J+
15.1
Cobalt
D
7440-48.4
NS
pqjL
0.5 J
12,9 J
6.6
47.8
Cobalt
T
7440484
1
IMAC
p IL
0.5 J
13 J
6.7
53.2
Copper
D
7440-50-8
NS
pqjL
4.8 J+
1.38 J
2 J
1.4 J+
Copper
T
7440-50-8
1000
02L
IL
1.6 J+
9.7 J
0,56 J
37.6 J+
Iron
D
7439-89-6
NS
pqIL
50 J
588
490
9200
Iron
T
7439-89-6
300
02L
p IL
128
1150
720
14900
Lead
D
7439-92-1
NS
pqIL
0,77
1 UJ
0.36
0A49 J+
Lead
T
7439-92-1
15
02L
p IL
0.15
1 UJ
0.38
12.1
Magnesium
T
7439-95-4
NS
pqjL
670
12700
15400
26100
Manganese
D
7439-96-5
NS
p IL
IOU
607
390
5000
Manganese
T
7439-96-5
SO
02L
p L
8.7
577
430
4500
Mercury
D
7439-97-6
NS
p IL
0,2'U
0.05 J
0.2 U
0.2 JJ
Mercury
T
7439-97-6
1
02L
pqJL
0.2 U
0.05 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
p IL
20 U
10 U
9.3 J+
131
Molybdenum
D
7439-98-7
NS
pqjL
5,1
1 UJ
0,5 U
5,5
Molybdenum
T
7439-98-7
NS
p IL
5.6
1 UJ
0.5 U
7A
Nickel
D
7440-02-0
NS
pqIL
0,5 UJ
12.4 J
10.7
20,1
Nickel
T
7440-02-0
100
02L
IL
0.54 J+
15A J
11.3
31.4 J+
Potassium
T
7440-09-7
NS
1L
15600
1700
5000 U
9510
Selenium
D
7782-49-2
NS
p IL
0,53
1 UJ
1.2
0.5 U
Selenium
T
7782-49-2
20
02L
p IL
0,75
1,03 J
1
2,2
Sodium
T
7440-23-5
NS
p IL
18700
35400
26500
35600
Strontium
D
7440-24-6
NS
pqIL
450
589
650
1800
Strontium
T
7440-24-6
NS
IL
570
604
650
1900
Thallium
D
7440-28-0
NS
pqjL
0.1 J
0.2 UJ
0.1 U
0,26
Thallium
T
7440-28-0
0.2
IMAC
p IL
0,1 J
0.2 UJ
0.1 U
0.56
Vanadium
D
7440-62-2
NS
pQJL
8.5
0.3 UJ
1 U
0.91 J
Vanadium
T
7440-62-2
0.3
IMAC
NIL
8.4
0.654 J
1 U
36.5
Zinc
D
7440-66-6
NS
pqIL
10 U
78
34 J
2700
Zinc
T
7440-66-6
1000
02L
p IL
10 UJ
71
25
3000
Total Dissolved Solids
N
TDS
500000
02L
p L
350000 J-
270000
257000
377000
Total Organic Carbon
N
TCC
NS
IL
1100
738
1200 J+
14900
Total Suspended Solids
N
TSS
NS
1L
14000 J-
9000
6200
1320000
Alkalinity, CO3
N
ALK-CO3
NS
p IL
130000
10000 U
5000 U
145000 J+
Alkalinity, HCO3
N
ALK-HCO3
NS
pQJL
10000 U
83000
71000
98000
Alkalinity, lab
N
ALK-LAB
-
NS
pqJL
270000
83000
71000
243000
Chloride
N
16887-00-6
250000
02L
pqjL
8000
9100
8800
29400
Nitrite as N
N
14797-65-0
1000
02L
L
10 UJ
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pqIL
20 J
20 U
27
Sulfate
N
14808-79-8
250000
02L
p IL
15500
91000
90500
42900
Sulfide
N
19496-25-8
NS
7L
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
p IL
As V
T
10103-60-3
NS
pqjL
Chromium VI
T
18540-29-9
0.07
❑HHS
pq1L
Fe II
T
1345-25-1
NS
pqIL
Fe(Ill)
T
1309-37-1
NS
p IL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
pqJL
IV
T
10102-18-8
NS
pqjL
re
.(VI)
T
13410-01-0
NS
L
Uranium, Natural
T
7440-61-1
NS
pqIL
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 Name11D:
MW-317BR
MW-3181)
MW-318D
OW-303D
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 2 3Q-2015
6/512015
61212015
9/912015
9/12/2015
N
N
N
N
MW-317BR
MW-3180
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
pCi1L
Radium-228
T
15262-20-1
NS
Ci/L
Uranium-233
T
13968-55-3
NS
u !I
Uranium-234
T
13966-29-5
NS
u 1l
Uranium-236
T
13982-70-2
NS
ugh
❑ ssolved Oxygen
N
DO
NS
m 1L
1.38
1.5
0,22
Temp Celsius
N
TEMP
NS
Deg C
21.1
21.1
26.9
H (field)
N
PH
6.5
8.5
02L
Su
11."
5.51
5.23
Turbidity. field
N
TURB
--
NS
NTU
3.12
10.63
6.08
Spec. Cond. field
N
SC
NS
PSI=
1399
404
379.3
Oxidation Reduction. Potential
N
ORP
NS
mV
-29.3
241.9
194.5
GW Depth OC
N
JGW DEPTH-Tod—NS
I it
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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 Gowngradient 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-1UD
GWA-11D
GWA-11D
GWA-115
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
61512015
9/3/2015
611012015
6130/2015
N
N
N
N
N
N
N
GWA-10D
GWA-10D
DR-GWA-10D-NS-3015
GWA-11D
DR-GWA-11D-NS-3015
GWA-11S
GWA-14D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
uglL
9
100 U
3.3 J
100 U
6.5 J
100 U
Aluminum
T
7429-90-5
NS
pqIL
6940
1100
425 J+
330
53
90 J
Antimony
D
7440-36-0
NS
uglL
1 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
NIL
1 U
0,5 U
0.5 U
0.5 U
0,18 J
0.5 U
Arsenic
D
7440-38-2
NS
IL
1 U
0.5 U
0.2 J
0.28 J
0.14 J
0.36 J
Arsenic
T
7440-38-2
10
02L
pIL
1 U
0.4 J
0.25 J
0,39 J
0,18 J
0.38 J
Barium
D
7440-39-3
NS
u IL
55
32
60
55
24
75
Barium
T
7440-39-3
700
02L
pgIL
136
65
64
63
25
78
Beryllium
D
7440-41-7
NS
u 1L
1 U
0.13 J
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
1 U
0,36
0.2 U
0.2 U
0,2 U
0.2 U
Boron
D
7440-42-8
NS
W IL
172
300
50 U
50 U
100
250
Boron
T
7440-42-8
700
02L
pgIL
298
310
50 U
50 U
110
260
Cadmium
D
7440-43-9
NS
u 1L
1 U
0.033 J
0.08 U
0.08 U
0.039 J
0.08 U
Cadmium
T
7440-43-9
2
02L
pgIL
1 1 U
0,049 J
0.08 U
0.08 U
0,046 J
0,08 U
Calcium
T
7440-70-2
NS
IL
24200
19800
48000
55500
9730
66200
Chromium
D
7440-47-3
NS
pgIL
1 U
2.2
0,28 J+
2.3 J+
7.7
0,28 J
Chromium
T
7440-47-3
10
02L
W IL
9.93
23.3
1 A J+
22+2
15.6
0.27 J+
Cobalt
D
7440-48-4
N
pgIL
2.11
0.71
1,2
1 A
2.9
0,2 J
Cobalt
T
7440-48-4
1
IMAC
W IL
3.45
1.1
II A
1.7
3.3
0.23 J
Copper
D
7440-50-8
NS
pgIL
7.79 J+
1.2
0,29 J+
4
0,28 J
0.28 J+
Copper
T
7440-50-8
1000
02L
W IL
8.24
4.2 J+
0,57 J+
1.3
0.44 J
1 UJ
Iron
D
7439-89-6
NS
IL
146
64
1180
2200
134
50 U
Iron
T
7439-89-6
300
02L
g IL
6040
1100
1700
3200
227
140
Lead
D
7439-92-1
NS
ppIL
1.04
0,16
0.1 U
0,41 J+
0,1 U
0.1 U
Lead
T
7439-92-1
15
02L
pgIL
9.42
2.3
0.26
0.24
0.11
0.1 U
Magnesium
T
7439-95-4
N5
pqIL
13100
13000
16600
20000
5140
7420
Manganese
D
7439-96-5
NS
pgIL
453
160
730
890
1200
290
Manganese
T
7439-96-5
50
02L
g IL
509
130
810
980
1200
300
Mercury
D
7439-97-6
NS
u IL
0.05 U
02 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pgIL
0.05 U
0.2 U
0.2 U
0.2 U
0,81 J+
0.2 U
Methane
N
74-82-8
NS
lL
10 U
1.6 J+
27
11A J+
13
62 J+
Molybdenum
D
7439-98-7
NS
IL
1 U
0,095 J
0.97
11
0,46 J
12.5
Molybdenum
T
7439-98-7
NS
W IL
1 U
0.53
0,87
1.6
0.7 J+
13
Nickel
D
7440-02-0
NS
IL
6,43
8.8
1.1 J+
11.3
13.9
0.51
Nickel
T
7440-02-0
100
02L
pgIL
11.1
19.3
1.7 J+
20.5
17
0.46 J+
Potassium
T
7440-09-7
NS
pgIL
3210
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
7782-49-2
NS
IL
1 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pgIL
1 U
0.22 J
0.5 U
0.5 U
0,5 U
0.5 U
Sodium
T
7440-23-5
NS
W IL
23400
17800
18100
19300
12500
21100
Strontium
D
7440-24-6
NS
pgIL
381
360
440
450
240
1700
Strontium
T
7440-24-6
NS
u IL
481
430
480
500
240
1800
Thallium
D
7440-28-0
NS
pgIL
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
IL
0.256
0.03 J
0.1 U
0.1 UJ
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pgIL
0.324
0.29 J
1 U
1 U
0.34 J
0.5 J
Vanadium
T
7440-62-2
0.3
IMAC
W IL
3.36
1.3
1.2 J+
0.45 J
0.52 J
0_.67 J
Zinc
D
7440-66-6
NS
pgIL
13
45
11
3.7 J+
7.6 J
10 U
Zinc
T
7440-66-6
1000
02L
W IL
43 J+
110
43 J+
6 J
2.7 J+
4.1 J
Total Dissolved Solids
N
TDS
500000
02L
p IL
220000
208000
240000 J-
291000
10000 U
325000
Total Organic Carbon
N
TCC
NS
IL
459 J+
1100
930 J
1100
860 J
650 J
Total Suspended Solids
N
TSS
NS
pgIL
15000
14000
53000
3800
8600
6500
Alkalinity, CO3
N
ALK-0O3
NS
u IL
10000 U
5000 U
10000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
39000
39800
180000
187000
57000
132000
Alkalinity, lab
N
ALK-LAB
NS
IL
39000
39800
180000
187000
57000
132000
Chloride
N
16887-00-6
250000
02L
pgIL
14000
11300
10900
10700
10000
13800
Nitrite as N
N
14797-65-0
1000
02L
W IL
232
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
IL
290
20 U
20 U
75
20 UJ
Sulfate
N
14808-79-8
250000
02L
g IL
3300
72400
37100
37200
4400
88500
Sulfide
N
19496-25-8
NS
PqIL
4000 UJ
100 U
200 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
IL
0.2 U
As V
T
10103-60-3
NS
IL
0.2 U
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
0.105
Fe II
T
1345-25-1
NS
pgIL
92
Fe(Ill)
T
1309-37-1
NS
W IL
20 U
Mn II
T
134443-0
NS
L
296
Mn(IV)
T
1313-13-9
NS
IL
1 UJ
Se IV
T
10102-18-8
NS
IL
0.091
Se l
T
1341MI-0
NS
pgIL
0.5 U
Uranium, Natural
T
7440-61-1
NS
IL
Page 1 of 12

Table 2-9 Groundwater Results Gowngradient 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
61512015
9/3/2015
611012015
6130/2015
N
N
N
N
N
N
N
GWA-10D
GWA-10D
DR-GWA-10D-NS-3015
GWA-11D
DR-GWA-11D-NS-3015
GWA-11S
GWA-14D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCill-
Radium-228
T
15262-20-1
NS
Ci/L
Uranium-233
T
13968-55-3
NS
u 1L
Uranium-234
T
13966-29-5
NS
pg1L
Uranium-236
T
13982-70-2
NS
1L
❑ ssolved Oxygen
N
DO
NS
m IL
1.15
1.08
0,47
4.74
0.58
Temp Celsius
N
TEMP
NS
Deq C
18.8
28.7
26.1
26.7
19
H((field)
N
PH
6.5
8.5
02L
SU
5.82
5.4 1
6.71
5.83
7.34
Turbidity. field
N
TURB
--
NS
NTU
7.65
8.69
9.23
7.93
4.73
Spec. Cond. (fieldl
N
SC
NS
PS1cm
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:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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 7 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample NameIID:
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
9/912015
9/912015
9/11/2015
613012015
9110/2015
611112015
9/812015
N
N
N
N
N
N
N
DR-GWA-I4D-NS-3015
DR-GWA-I4S-NS-3015
DR-GWA-I4S-NS-3015
GWA-15D
DR-GWA-I5D-NS-3015
GWA-10
DR-GWA-I D-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
uglL
100 J
100 U
74 J
100 U
4 J
100 U
Aluminum
T
7429-90-5
NS
pqIL
100 U
58 J
660
1000
413
60 J+
Antimony
D
7440-36-0
NS
uglL
0.5 J
0.5 U
0.17 J
0.5 U
0,24 J
1.1
Antimony
T
7440-36-0
1
IMAC
NIL
0,5 U
0,5 U
0.5 U
0,5 U
0.31 J
1.3
Arsenic
D
7440-38-2
NS
IL
0.45 J
1.2
0.14 J
0,31 J
1
1.3
Arsenic
T
7440-38-2
10
02L
u IL
0.45 J
1.2
0,18 J
0.32 J
1.2
1 A
Barium
D
7440-39-3
NS
uglL
76
58
61
52
51
68
Barium
T
7440-39-3
700
021-
qlL
5 U
47
67
59
62
79
Beryllium
D
7440-41-7
NS
u IL
0.2 U
0.2 U
0.2'J
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
0,2 U
0,2 U
0.2 U
0,084 J
0.2 U
0.2 U
Boron
D
7440-42-8
NS
W IL
260
49 J
79
73
50 U
50 J
Boron
T
7440-42-8
700
02L
pgIL
50 U
28 J
86
80
50 U
50 J
Cadmium
D
7440-43-9
NS
ugIL
0:08 U
0.08 U
0:08 U
0,08 U
0.08 J
0,08 U
Cadmium
T
7440-43-9
2
02L
pgIL
1 0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0,08 U
Calcium
T
7440-70-2
NS
IL
71600
10600
140000 1
126000
54300
34000
Chromium
D
7440-47-3
NS
IL
0,32 J
0,34 J
0,38 J
0.19 J
0.73
0.23 J
Chromium
T
7440-47-3
10
02L
W IL
0.66 J+
13.6
1.2 J+
1.8
1.6 J+
0.31 J
Cobalt
D
7440-48-4
NS
pqIL
0,18 J
7.3
0,14 J
0,5 U
0.5 U
0,5 U
Cobalt
T
7440-48-4
1
IMAC
W IL
0.32 J
3.5
0.24 J
0.61
0.3 J
0.5 U
Copper
D
7440-50-8
NS
pgIL
0,64 J
1 U
11
0.67 J
1 U
1 U
Copper
T
7440-50-8
1000
02L
W IL
0,25 J+
0.69 J+
0.76 J+
1.8
1.1 J+
1 UJ
Iron
D
7439-89-6
NS
IL
1 85
4900
26 J
50 U
136
50 J
Iron
T
7439-89-6
300
02L
g IL
50 J
3200
$40
980
719
69 J+
Lead
D
7439-92-1
NS
ppIL
0,11
0.1 U
0.1 U
0.12
0.1 U
0.1 U
Lead
T
7439-92-1
15
02L
pgIL
0.14
0.1
0,33 J+
1.3
0.29 J+
0A U
Magnesium
T
7439-95-4
NS
pqIL
7570
6040
18900
18400
5610
4210
Manganese
D
7439-96-5
1
NS
pgIL
330
7600
260
220
600
300
Manganese
T
7439-96-5
I
50
02L
g IL
5 uJ
2300
270
220
680
300 J+
Mercury
D
7439-97-6
NS
u IL
0.2 U
0.2 U
0.2 J
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
PgIL
0.2 U
0.2 U
0.2 U
0.087 J
0.2 U
0,2 U
Methane
N
74-82-8
NS
IL
338
8A J+
3.9 J+
5.2 J+
10 U
10.4 J+
Molybdenum
D
7439-98-7
NS
IL
13.3
2
0,93
1
2,6
3.9
Molybdenum
T
7439-98-7
NS
W IL
12.9
0.58
0.89
0.78
2.7
4.5
Nickel
D
7440-02-0
NS
IL
0,56
2,9
0,91
0.67
0,62 J+
0,5 U
Nickel
T
7440-02-0
100
02L
W IL
0.63 J+
10.9
1.1 J+
1.8
1 A J+
0.2 J+
Potassium
T
7440-09-7
NS
pgIL
5000 U
2990 J
5270
7580
6280
29700
Selenium
D
7782-49-2
NS
IL
0.5 J
0.5 U
0.22 J
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pgIL
0.5 U
0.5 U
0,24 J
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
W IL
21200
14200
26700
29800
10500
15500
Strontium
D
7440-24-6
NS
pgIL
1800
200
3300
3200
260
260
Strontium
T
7440-24-6
NS
u IL
5 J
110
3300
2800
310
310
Thallium
D
7440-28-0
NS
pgIL
0.1 J
0.1 U
0.1 U
01 U
0.045 J
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
IL
0.1 J
0.1 U
CA J
0.024 J
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pgIL
1 U
1 U
0.86 J
1.2
1 U
0.38 J
Vanadium
T
7440-62-2
0.3
IMAC
W IL
0_.62 J
0.48 J
1.5
3.2
0.79 J
0.45 J
Zinc
D
7440-66-6
NS
pgIL
14
13
18
7.4 J
10 U
10 J
Zinc
T
7440-66-6
1000
02L
W IL
4.3 J
5.6 J
3.8 J
4.1 J
4.8 J
10 J
Total Dissolved Solids
N
TDS
500000
02L
p IL
335000
218000
705000
618000
220000
198000
Total Organic Carbon
N
TCC
NS
IL
1000 J
1500
540 J
560 J
1000 J
690 J
Total Suspended Solids
N
TSS
NS
pgIL
46900
4900
42900
13400
33000
2500 U
Alkalinity, CO3
N
ALK-0O3
NS
u IL
5000 U
5000 U
5000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
130000
77900
129000
94500
160000
126000
Alkalinity, lab
N
ALK-LAB
NS
IL
130000
77900
129000
94500
160000
126000
Chloride
N
16887-00-6
250000
02L
pgIL
13100
7500
13300
12700
1500
1700
Nitrite as N
N
14797-65-0
1000
02L
W IL
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
IL
20 U
20 U
20 UJ
21
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
g IL
90800
25700
307000
301000
4200
5400
Sulfide
N
19496-25-8
NS
pgIL
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
IL
As V
T
10103-60-3
NS
IL
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
Fe II
T
1345-25-1
NS
pgIL
Fe(Ill)
T
1309-37-1
NS
W IL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
pgIL
Se IV
T
10102-18-8
NS
IL
Se l
T
1341MI-0
NS
JgIL
Uranium, Natural
T
7440-61-1
NS
pcjtL
Page 3 of 12

Table 2-9 Groundwater Results Downgrad-sent of the Ash Basin and Ash Storage Areas - Round 7 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name1ID:
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
9/912015
9/912015
9/11/2015
613012015
9110/2015
611112015
9/812015
N
N
N
N
N
N
N
DR-GWA-I4D-NS-3015
DR-GWA-I4S-NS-3015
DR-GWA-I4S-NS-3015
GWA-15D
DR-GWA-I5D-NS-3015
GWA-10
❑R-GWA-ID-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u IL.
Uranium-234
T
13966--29-5
NS
pg1L
Uranium-236
T
13982-70-2
NS
/L
Dissolved Oxygen
N
DO
NS
m L
0,18
1.75
0.71
0.3
0,54
0.3
Temp Celsius
N
TEMP
NS
Deg C
29.9
26
20.6
21.2
19.7
18.7
H (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
s1cm
508
173.7
1576
873
389.2
287.9
Oxidation Reduction. Potential
N
oRP
NS
my
-45.5
61 A
156
84.8
-4.1
-78.8
GW Depth TOC
N
GW DEPTH -TO
NS
I
ft
6,32
9.8
23.34
33,05
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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 7 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Namefle:
GWA-1S
GWA-IS
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 i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
611712015
919/2015
6/10/2015
91812015
6/11/2015
9/4/2015
61412015
N
N
N
N
N
N
N
GWA-1S
DR-GWA-IS,NS•3015
GWA-2D
DR-GWA-2D-NS-3015
GWA-2S
DR-GWA-2S-NS-3015
GWA-3D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
uglL
100 U
100 U
5.8 J
100 U
3.4 J
100 U
9
Aluminum
T
7429-90-5
NS
pqIL
920
110
90.9
310
806
1100 J+
350
Antimony
D
7440-36-0
NS
uglL
0.37 J
0.9
0.55
0.25 J
0.5 U
1 U
Antimony
T
7440-36-0
1
IMAC
NIL
0.5 UJ
0,95
2.2
0,55
0.5 U
0,5 U
1 U
Arsenic
D
7440-38-2
NS
IL
0.5 U
0.5 U
1.1
1.5
0.5 U
1 U
Arsenic
T
7440-38-2
10
02L
p IL
0.18 J
0.5 U
1.3
1.7
0.14 J
0,39 J
1 U
Barium
D
7440-39-3
NS
uglL
6,2
7.7
40
41
18
17
9
Barium
T
7440-39-3
700
021-
qlL
12
8.6
56
46
26
27
13
Beryllium
D
7440-41-7
NS
u IL
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1 U
Beryllium
T
7440-41-7
4
IMAC
p IL
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
W IL
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Boron
T
7440-42-8
700
02L
pgIL
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Cadmium
D
7440-43-9
NS
ugIL
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
Cadmium
T
7440-43-9
2
02L
pgIL
1 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
IL
3450
2320
58200
43200
2690
2940
10800
Chromium
D
7440-47-3
NS
IL
2.2 J+
0,48 J
4.3
17
1A
12.3
Chromium
T
7440-47-3
10
02L
W IL
1318
1.6 J+
5.7
6.3
2.6
4.7
17.7
Cobalt
D
7440-48-4
NS
pgIL
2.4
1,5
0,5 U
0.5 U
1,9
1 U
Cobalt
T
7440-48-4
1
IMAC
W IL
3
1.5
0.5 U
0,3 J
2.3
1.4 J+
1.02
Copper
D
7440-50-8
NS
I PqIL
0.76 J+
2.4
0,49 J
6A
0.31 J+
1.03 J+
Copper
T
7440-50-8
1000
02L
W IL
3 J+
0.5 J
0.54 J
0.86 J+
0.92 J
2.3
2.99
Iron
D
7439-89-6
NS
IL
50 U
50 U
50 U
50 U
50 U
120
101
Iron
T
7439-89-6
300
02L
g IL
1200
170
86.7
230
909
1600 J+
411
Lead
D
7439-92-1
NS
ppIL
0.1 U
0,27
0.1 U
036
01 U
1 U
Lead
T
7439-92-1
15
02L
pgIL
0.51
0.069 J
0.23
0.34
0.4 J+
1.2
1.5
Magnesium
T
7439-95-4
NS
pqIL
3470
1790
3860
6700
1290
1190
8090
Manganese
D
7439-96-5
1
NS
pgIL
100
71
5 U
280
88
81
107
Manganese
T
7439-96-5
I
50
02L
g IL
120
74
25
280
94
46 J+
122
Mercury
D
7439-97-6
NS
u IL
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
IL
0,11 J+
0.2 U
0,79 J+
0.2 U
02 U
0.2 U
0.05 U
Methane
N
74-82-8
NS
IL
10 U
2.1 J+
10 U
3.6 J+
10 U
2.5 J+
10 U
Molybdenum
D
7439-98-7
NS
IL
0.11 J
0.5 U
3.3
1.7
0.12 J
1.01
Molybdenum
T
7439-98-7
NS
W IL
0.3 J
0.14 J
3.9
2.2
0.11 J
0.19 J
1.28
Nickel
D
7440-02-0
NS
IL
8.2
2,1
0,31 J
0,46 J
3,8
12.5
Nickel
T
7440-02-0
100
02L
W IL
10.3
2.3
0,47 J
1.2 J+
4.5 J+
4.3
16.9
Potassium
T
7440-09-7
NS
pgIL
5000 U
5000 U
5560
5000 U
5000 U
5000 U
796
Selenium
D
7782-49-2
NS
IL
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Selenium
T
7782-49-2
20
02L
pgIL
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
W IL
18400
15000
11400
9490
3750 J
3390 J
24900
Strontium
D
7440-24-6
NS
pgIL
53
35
210
260
25
23
155
Strontium
T
7440-24-6
NS
u IL
59
36
250
270
26
24
162
Thallium
D
7440-28-0
NS
pgIL
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
IL
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
I PgIL
1 U
1 U
0.5 J
0.33 J
1 U
0.3 U
Vanadium
T
7440-62-2
0.3
IMAC
W IL
1.5
0.39 J
0.57 J
0.65 J
1.3
4.1
0.3 U
Zinc
D
7440-66-6
NS
pgIL
1 3.5 J
22
10 U
10 U
6,6 J
9,1 J+
19
Zinc
T
7440-66-6
1000
02L
W IL
9.6 J+
27
3.1 J+
2.8 J
8.7 J
7 J
16 J+
Total Dissolved Solids
N
TDS
500000
02L
p IL
105000
56000 J
10000 U
198000
37000
96000 J+
160000
Total Organic Carbon
N
TCC
NS
IL
1900
1100
780 J
520 J
9300
960 J
412 J+
Total Suspended Solids
N
TSS
NS
pgIL
25000
2700
200000
97200
17000
58000
15000
Alkalinity, CO3
N
ALK-0O3
NS
u IL
10000 U
5000 U
18000
5000 U
10000 U
5000 U
10000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
37000
18700
29000
128000
16000
13600
75000
Alkalinity, lab
N
ALK-LAB
NS
IL
37000
18700
51000
128000
16000
13600
75000
Chloride
N
16887-00-6
250000
02L
pgIL
3600 J+
4200
5000
4100
1800
1700
22000
Nitrite as N
N
14797-65-0
1000
02L
W IL
57
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
IL
20 U
37
34
20 UJ
160 J+
190
Sulfate
N
14808-79-8
250000
02L
g IL
15100 J+
15100
3100
3700
640 J
1000
6200
Sulfide
N
18496-25-8
NS
pgIL
200 U
100 U
100 U
100 U
100 U
100 U
500 U
As(III)
T
7784-46-5
NS
IL
As V
T
10103-60-3
NS
IL
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
Fe(II)
T
1345-25-1
NS
pgIL
Fe(Ill)
T
1309-37-1
NS
W IL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
IL
Se IV
T
10102-18-8
NS
IL
Se l
T
1341MI-0
NS
Pq,I
Uranium, Natural
T
7440-61-1
NS
IL
Page 5 of 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 7 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Namefl0:
GWA-15
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 i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
611712015
919/2015
6/10/2015
91812015
6/11/2015
9/4/2015
61412015
N
N
N
N
N
N
N
GWA-1S
DR-GWA-IS,NS•3015
GWA-2D
DR-GWA-2D-NS-3015
GWA-2S
DR-GWA-2S-NS-3015
GWA-3D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u 1L.
Uranium-234
T
13966--29-5
NS
pg1L
Uranium-236
T
13982-70-2
NS
/L
❑ ssolved Oxygen
N
DO
NS
m L
49.6
2.9
1
0.33
3,8
2.7
Temp Celsius
N
TEMP
NS
Deg C
23.8
19.7
31 A
28.5
35.9
18.5
H((field)
N
PH
6.5
8.5
02L
SU
5.97
5.7
8.98
7A4
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
ps1cm
105
111.2
187.2
346.5
50.1
244.7
Oxidation Reduction. Potential
N
ORP
NS
my
296.E
5.6
177
120.5
293.4
246.2
GW Depth TOC
N
JGW DEPTH -TO
NS
ft
32.9
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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
91412015
6/4/2015
914/2015
6/23/2015
91912015
6/1912015
9110/2015
N
N
N
N
N
N
N
DR-GWA-3D-NS-3Q15
GWA-3S
DR-GWA-3S-NS-3015
GWA-4D
DR-GWA-4D-NS-3Q15
GWA-4S
DR-GWA-4S-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
uglL
100 U
17
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pqIL
170
236
190 J'+
430
360
380
1700
Antimony
D
7440-36-0
NS
uglL
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
NIL
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
IL
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
u IL
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
uglL
6
45
38
20
26
27
39
Barium
T
7440-39-3
700
021-
qlL
9.3
49
34
26
31
32
60
Beryllium
D
7440-41-7
NS
u IL
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
p IL
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
W IL
27 J
50 U
50 U
240
250
200 J+
250
Boron
T
7440-42-8
700
02L
pgIL
26 J
50 U
50 U
250
250
190
250
Cadmium
D
7440-43-9
NS
uglL
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
pgIL
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
IL
11000
5830
2050
26500
20900
19500
19300
Chromium
D
7440-47-3
NS
IL
17.4
1 U
11
0,53
0.36 J
0.81
7
Chromium
T
7440-47-3
10
02L
W IL
39.7
1 U
4.2
1.2 J+
IA J+
3.2
35.2
Cobalt
D
7440-48-4
NS
pgIL
0.91
11.3
17.6
0,17 J
0.29 J
2.7
2.5
Cobalt
T
7440-48-4
1
IMAC
W IL
1.1
12.2
10.8
0.35 J
0.54
2.7
3.8
Copper
D
7440-50-8
NS
pgIL
2.6 J+
1 UJ
3,2
0,41 J
1 J
1 U
0.67 J
Copper
T
7440-50-8
loco
02L
W IL
1.8 J+
8.6
1.1
1.4 J'+
0." J
0,58 J
3.7
Iron
D
7439-89-6
NS
IL
220
14
50 U
50 U
29 J
50 U
150
Iron
T
7439-89-6
300
02L
g IL
460
190
220 J+
370 J+
330
530
2400
Lead
D
7439-92-1
NS
ppIL
0.27
1 U
0,28
0.1 U
0.12
0.1 U
0.067 J
Lead
T
7439-92-1
15
02L
pgIL
0.8
1 U
0.2
0.45 J+
0.53
0.29
1.7
Magnesium
T
7439-95-4
NS
pqIL
9140
4990
1920
6890
7530
5970
5940
Manganese
D
7439-96-5
1
NS
pgIL
76
480
380
23
70
560
510
Manganese
T
7439-96-5
1
50
02L
g IL
89
533
300 J+
33
90
590
540
Mercury
D
7439-97-6
NS
u IL
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
I pgIl-
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
IL
2 J+
l0 U
1.8 J+
12.7 J+
115
82
529
Molybdenum
D
7439-98-7
NS
IL
0,56
1 U
0,5 U
0,54 J+
0.15 1
11.9
12.8
Molybdenum
T
7439-98-7
NS
W IL
1.2
1 U
0.5 U
0.64
0.15 J
11.6
15.2
Nickel
D
7440-02-0
NS
IL
28A
8.27
9
0,68
0.94
4.5
21
Nickel
T
7440-02-0
100
02L
W IL
34.4
8.7
9
0.91 J+
1.3
4.5
23A
Potassium
T
7440-09-7
NS
pgIL
5000 U
2570
2700 J
5000 U
5000 U
4320 J
4390 J
Selenium
D
7782-49-2
NS
IL
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
pgIL
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
W IL
21100
11300
7040
17400
18600
17200
16600
Strontium
D
7440-24-6
NS
pgIL
160
84
53
310
290
290
340
Strontium
T
7440-24-6
NS
u IL
180
108
42
340
280
300
330
Thallium
D
7440-28-0
NS
pgIL
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
IL
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
pgIL
1 U
0.3 U
1 U
0.95 J
1 U
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
W IL
_ 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
pgIL
29
27
21 J+
10 U
9.8 J
2.6 J
4,6 J
Zinc
T
7440-66-6
1000
02L
W IL
20
20 J+
11
5.9 J+
3A J
3A J
8.5 J
Total Dissolved Solids
N
TDS
500000
02L
p IL
196000 J+
110000
83000 J+
188000
171000
152000
157000
Total Organic Carbon
N
TCC
NS
IL
1000 U
588 J+
2000 U
14000
1000 UJ
650 J
1000 U
Total Suspended Solids
N
TSS
NS
pgIL
24400
5000 U
2700 U
102000
63000
68100
601000
Alkalinity, CO3
N
ALK-0O3
NS
u IL
5000 U
10000 U
5000 U
5000 U
5000 U 1
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
73000
67000
19900
64700
47200 1
58800
63500
Alkalinity, lab
N
ALK-LAB
NS
IL
73000 J-
67000
19900
64700
47200 1
58800
63500
Chloride
N
16887-00-6
250000
02L
pgIL
21700
11000
4500
14200
13300 1
11400
11100
Nitrite as N
N
14797-65-0
1000
02L
W IL
31
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
IL
62 J-
30
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
g IL
3900
73000
1800
47800
42700
38200
28700
Sulfide
N
18496-25-8
NS
pgIL
100 U
100 U
100 U
100 U
100 U
100 U
100 UJ
As(III)
T
7784-46-5
NS
IL
As V
T
10103-60-3
NS
IL
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
Fe II
T
1345-25-1
NS
pgIL
Fe(Ill)
T
1309-37-1
NS
W IL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
IL
IV
T
10102-18-8
NS
IL
rSe
Se l
T
1341MI-0
NS
pgIL
Uranium, Natural
T
7440-61-1
NS
IL
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
91412015
6/4/2015
914/2015
6/23/2015
91912015
611912015
9110/2015
N
N
N
N
N
N
N
DR-GWA-3D-NS-3Q15
GWA-3S
DR-GWA-3S-NS-3015
GWA-4D
DR-GWA-4D-NS-3Q15
GWA-4S
DR-GWA-4S-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u IL.
Uranium-234
T
13966--29-5
NS
pg1L
Uranium-236
T
13982-70-2
NS
/L
Dissolved Oxygen
N
DO
NS
m L
5,47
1,49
0,18
0.51
Temp Celsius
N
TEMP
NS
Deg C
19.1
22.6
27.1
23.9
H((field)
N
PH
6.5
8.5
02L
SU
5.51
6.9
6.3
6.39
Turbidity. field
N
TURB
--
NS
NTU
7,42
7.01
14.6
35.84
Spec. Cond. field
N
SC
NS
ps1cm
141.7
281.9
256,9
189.E
Oxidation Reduction. Potential
N
ORP
NS
my
303.7
180.E
51.9
60.8
GW Depth TOC
N
JGW DEPTH -TO
NS
ft
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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 Namefl0:
GWA-58R
GWA-58R
GWA-60
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)
611612015
9/912015
6/2912015
9/11/2015
6130/2015
9112/2015
6/23/2015
N
N
N
N
N
N
N
GWA-58R
DR-GWA-5BR-NS-3015
GWA-6D
DR-GWA-6D-NS-3015
GWA-6S
DR-GWA-6S-NS-3015
MW-21D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
uglL
5.8 J
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pqIL
187
65 J
120
100 U
1300
220
100 U
Antimony
D
7440-36-0
NS
uglL
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
NIL
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
IL
0,85
0.31 J
0.98
0.96
2.4 J
3.1
0.41 J+
Arsenic
T
7440-38-2
10
02L
p IL
0,83
0,19 J
0.96
0,79
2,2 J
2.9
0,21 J
Barium
D
7440-39-3
NS
uglL
73
64
33
42
200
210
34
Barium
T
7440-39-3
700
021-
qIL
75
65
35
43
210
220
42
Beryllium
D
7440-41-7
NS
u IL
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
p IL
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
W IL
190
190
630
620
620
710
210
Boron
T
7440-42-8
700
02L
pgIL
190 J+
190
610
600 1
610
700
210
Cadmium
D
7440-43-9
NS
uglL
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
PqIL
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
IL
188000
174000
50500
45500
81100
83000
136000
Chromium
D
7440-47-3
NS
IL
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
W IL
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
pgIL
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
W IL
0.32 J
0.5 U
0.51
0.51
1.3 J
1.8
0.5 U
Copper
D
7440-50-8
NS
pgIL
1 UJ
1 U
0,32 J
0.64 J
5 U
0.29 J
4.5 J+
Copper
T
7440-50-8
loco
02L
W IL
1 UJ
1 U
1 UJ
1 U
3.2 J
0,39 J
1.5 J+
Iron
D
7439-89-6
NS
IL
210
190
7400
6700
25300
13600
690
Iron
T
7439-89-6
300
02L
g IL
307
260
7400
6700
21200
15200
550
Lead
D
7439-92-1
NS
ppIL
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
pgIL
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
pqIL
25900
27900
10400
10900
14100
12500
19100
Manganese
D
7439-96-5
1
NS
pgIL
620
630
1300
1200
3900
3700
940
Manganese
T
7439-96-5
I
50
02L
g IL
630
650
1300
1200
3700
3800
920
Mercury
D
7439-97-6
NS
u IL
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
IL
0,2 UJ
0.2 U
0,2 U
0,2 U
0,2 U
02 U
0,2 U
Methane
N
74-82-8
NS
IL
17
16.9 J+
3080
2920
744 J
2740
16.9 J+
Molybdenum
D
7439-98-7
NS
IL
0,44 J
0,22 J
3.3
5A
13.7
8.6
0.34 J+
Molybdenum
T
7439-98-7
NS
W IL
0.55
0.23 J
3
5.2
9.2
8
0,31 J
Nickel
D
7440-02-0
NS
IL
1 J+
0,82
2.2
2
1.4 J
1,8
0.75 J+
Nickel
T
7440-02-0
100
02L
W IL
1.1 J+
0.85
2.1 J+
1.9
2.9
1.9
0.58 J+
Potassium
T
7440-09-7
NS
pgIL
5000 U
5000 U
5000 U
5000 U
12000
10700
5000 U
Selenium
D
7782-49-2
NS
IL
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
pgIL
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
W IL
29600
21000
28200
27000
24700
26200
15800
Strontium
D
7440-24-6
NS
pgIL
2300
2100
190
190
860
680
810
Strontium
T
7440-24-6
NS
u IL
2300
2100
200
200
850
710
960
Thallium
D
7440-28-0
NS
pgIL
0,1 UJ
0.1 U
0.1 U
R1 U
0.14 J
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
IL
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
pgIL
1 U
1 U
1 U
1 U
5 U
1.2
1 U
Vanadium
T
7440-62-2
0.3
IMAC
W IL
0.49 J_
1 U
1 U
1 U
6.5
1.1
1 U
Zinc
D
7440-66-6
NS
pgIL
23
6,6 J
10 U
5.7 J
2.7 J
13
32 J+
Zinc
T
7440-66-6
1000
02L
W IL
6.6 J
10 U
10 UJ
6.4 J
27 J+
4.8 J
10 U
Total Dissolved Solids
N
TDS
500000
02L
p IL
873000
799000
302000
293000
432000
340000
639000
Total Organic Carbon
N
TCC
NS
IL
26800
1000 UJ
1400
23200
34800
7800
1000 U
Total Suspended Solids
N
TSS
NS
pgIL
10700
2900
15000
6200
67000
371000
3500
Alkalinity, CO3
N
ALK-0O3
NS
u IL
10000 U
5000 U
5000 U
5000 U
5000 U
5000 UJ
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
150000
154000
124000
92100
290000
317000
161000
Alkalinity, lab
N
ALK-LAB
NS
IL
150000
154000
124000 J+
92100
290000
317000
161000
Chloride
N
16887-00-6
250000
02L
pgIL
17500
18200
16300
18300
18500
18900
17700
Nitrite as N
N
14797-65-0
1000
02L
W IL
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
PgIL
20 U
20 U
22 J+
20 UJ
20 U
16 J-
20 U
Sulfate
N
14808-79-8
250000
02L
g IL
416000
362000
88700
97700
10900
2300
274000
Sulfide
N
18496-25-8
NS
pgIL
100 U
100 U
100 UJ
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
IL
As V
T
10103-60-3
NS
IL
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
Fe II
T
1345-25-1
NS
pgIL
Fe(Ill)
T
1309-37-1
NS
W IL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
IL
Se IV
T
10102-18-8
NS
IL
Se l
T
1341MI-0
NS
pgIL
Uranium, Natural
T
7440-61-1
NS
IL
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 Namefl0:
GWA-5614
GWA-58R
GWA-60
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)
611612015
9/912015
6/2912015
9/11/2015
6130/2015
9112/2015
6/23/2015
N
N
N
N
N
N
N
GWA-58R
DR-GWA-5BR-NS-3015
GWA-6D
DR-GWA-6D-NS-3015
GWA-6S
DR-GWA-6S-NS-3015
MW-21D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u 1L.
Uranium-234
T
13966--29-5
NS
pg1L
Uranium-236
T
13982-70-2
NS
/L
❑ ssolved Oxygen
N
DO
NS
m L
0,42
0,35
18
0.3
0.2
0.34
Temp Celsius
N
TEMP
NS
Deg C
23.7
22.4
18.6
20.5
21.1
23.4
H((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. (fieldl
N
SC
NS
s1cm
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-TOCJ
NS
ft
18.85
19,7
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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 Qowngradient 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 NamellD:
Mw-21D
Mw-21D
MW-21$
MW-21S
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
612412015
911012015
6124/2015
911012015
N
N
N
N
Mw-210
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
uglL
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pqIL
250
100 U
94 J
Antimony
D
7440-36-0
NS
uglL
0.5 U
0.3 J
0.18 J
Antimony
T
7440-36-0
1
IMAC
NIL
0.5 U
0,29 J
0.5 U
Arsenic
D
7440-38-2
NS
IL
0.12 J
16.9
34.2
Arsenic
T
7440-38-2
10
02L
p IL
0,17 J
16.8
42.8
Barium
D
7440-39-3
NS
uglL
38
33
40
Barium
T
7440-39-3
700
021-
qlL
40
38
45
Beryllium
D
7440-41-7
NS
u IL
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
0.2 U
0,2 U
0.2 U
Boron
D
7440-42-8
NS
W IL
210
180
250
Boron
T
7440-42-8
700
02L
pgIL
210
190
260
Cadmium
D
7440-43-9
NS
uglL
0.08 U
0.03 J
0,08 U
Cadmium
T
7440-43-9
2
02L
pgIL
0.08 U
0,08 U
0.08 U
Calcium
T
7440-70-2
NS
IL
144000
22000
23400
Chromium
D
7440-47-3
NS
IL
0,19 J
0.22 J+
0,5 U
Chromium
T
7440-47-3
10
02L
W IL
0.92
0.28 J+
0.34 J
Cobalt
D
7440-48-4
NS
pgIL
0.5 U
0,72
1.1
Cobalt
T
7440-48-4
1
IMAC
W IL
0.5 U
0.79
1.5
Copper
D
7440-50-8
NS
pgIL
18
1 UJ
0,27 J
Copper
T
7440-50-8
loco
02L
W IL
1.2
1 UJ
1 U
Iron
D
7439-89-6
NS
IL
160
50 U
50 U
Iron
T
7439-89-6
300
02L
g IL
440
50 U
120
Lead
D
7439-92-1
NS
ppIL
0,25
0,1 UJ
0.1 U
Lead
T
7439-92-1
15
02L
pgIL
0.45
0.1 U
0.088 J
Magnesium
T
7439-95-4
NS
PqIL
19900
5420
6160
Manganese
D
7439-96-5
1
NS
pgIL
870
640
740
Manganese
T
7439-96-5
I
50
02L
g IL
850
670
760
Mercury
D
7439-97-6
NS
u IL
0.2 U
02 U
02 U
Mercury
T
7439-97-6
1
02L
IL
0.2 U
0,2 U
0.2 U
Methane
N
74-82-8
NS
IL
35.8 J
8.5 J+
764 J
Molybdenum
D
7439-98-7
NS
IL
0,32 J
20.7
197
Molybdenum
T
7439-98-7
NS
W IL
0.3 J
19.9
24.3
Nickel
D
7440-02-0
NS
IL
0,6
1.2 J+
1.2
Nickel
T
7440-02-0
100
02L
W IL
1
1.1 J+
1.6
Potassium
T
7440-09-7
NS
pgIL
5000 U
4080 J
4880 J
Selenium
D
7782-49-2
NS
IL
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pgIL
0,5 U
0,5 U
0,5 U
Sodium
T
7440-23-5
NS
W IL
18300
12900
15600
Strontium
D
7440-24-6
NS
pgIL
950
320
420
Strontium
T
7440-24-6
NS
u IL
890
370
420
Thallium
D
7440-28-0
NS
pgIL
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
IL
0.1 U
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pgIL
1 U
1.6
0.41 J
Vanadium
T
7440-62-2
0.3
IMAC
W IL
0.72 J_
1.5
0.76 J
Zinc
D
7440-66-6
NS
pgIL
10 U
10 UJ
10 U
Zinc
T
7440-66-6
1000
02L
W IL
2.9 J
10 UJ
2.9 J
Total Dissolved Solids
N
TDS
500000
02L
p IL
599000
137000
151000
Total Organic Carbon
N
TCC
NS
IL
1000 U
1000 U
650 J
Total Suspended Solids
N
TSS
NS
pgIL
4700
5000 U
4000
Alkalinity, CO3
N
ALK-0O3
NS
u IL
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
152000
58200
76900
Alkalinity, lab
N
ALK-LAB
NS
IL
152000
58200
76900
Chloride
N
16887-00-6
250000
02L
pgIL
17900
11200
11700
Nitrite as N
N
14797-65-0
1000
02L
W IL
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
PgIL
20 U
20 UJ
20 U
Sulfate
N
14808-79-8
250000
02L
g IL
269000
37000
23200
Sulfide
N
18496-25-8
NS
pgIL
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
IL
0.2 U
1.04
As V
T
10103-60-3
NS
IL
0,2 U
17,9
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
0.0103303103000000
0.029 J+
Fe II
T
1345-25-1
NS
pgIL
192
20 U
Fe(Ill)
T
1309-37-1
NS
W IL
431
7.1
Mn II
T
1344-43-0
NS
L
1020
645
Mn(IV)
T
1313-13-9
NS
IL
17.44583628380
24.6
Se IV
T
10102-18-8
NS
IL
0.5 u
0.5 U
Se l
T
1341MI-0
NS
pgIL
0.5 U
0.5 U
Uranium, Natural
T
7440-61-1
NS
IL
Page 11 of 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 7 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample NameflD:
MW-210
MW-21D
MW-21S
Mw-21S
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 301-2015
612412015
9/1012015
612412015
9/1012015
N
N
N
N
MW-210
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
pCi1L
Radium-228
T
15262-20-1
NS
CifL
Uranium-233
T
13968-55-3
NS
/L.
Uranium-234
T
13966-29-5
NS
IL
Uranium-236
T
13982-70-2
NS
IL
Dissolved Oxygen
N
DO
NS
m IL
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. (fieldl
SC
NS
ps1cm
820
250
Oxidation Reduction Potential
N
ORP
NS
my
-12
140
GW Depth TOC
N
JGW DEPTH -TO
NS
I
I ft
3.9
5,18
Notes:
pg1L = micrograms per liter
µS1cm = microsiemens per centimeter
ft = feet
mV = millivolts
NTU - nephelometrlc turbidity units
pCi11L = 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
Criteria Source:
Turbidity,._
02L
11
02L
I 50
02L
0,07
DHHS
IMAC
1
02L
4
IMAC
Boron
700
02L
10
02L
.bManganese
1
IMAC
300
02L
50
02L
20
1
PPBC (Minimum (for ranges)):
I SCREENING 1 •
®®®
• 1
��®®®���®
Result Flagi'
��
• • •
��r�a���a����s��®����_��
.:. , ,
���
,
_era
Page 1 of 6

Table 2-10 Constituents of Interest Evaluation
Corrective Action Pan Part 2
Dan River Steam Station Ash Basin
NC GW Criteria;
Turbidity,pH
83
Iron
11
Manganese.
I 50
0,07
1
4
Boron
1 700
10
...Manganese
1
300
15
50
20
PPBC (Minimum (for ranges)):,
SCREENING ONO
•�®��®�a�a_��a�a-a��_�'®®a_
. , I
_ate
�a�
.•�®���s�aa�a�a�a�a�a_a_a�a�
., I
�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
pglL
300
02L
Manganese
T
pglL
50
02L
Chromium (VI)
T
pglL
0,07
DHHS
Antimony
T
pglL
1
IMAC
Arsenic
T
pglL
10
02L
Beryllium
T
pglL
4
1MAC
Boron
T
NgIL
700
02L
Chromium
T
pglL
10
02L
Cobalt
T
pglL
1
IMAC
Iran
T
pglL
300
02L
Lead
T
pg/L
15
02L
Manganese
T
pglL
50
02L
Selenium
T
pg L
20
02L
PPBC (Minimum (for ranges)):
PPBC:
SCREENING ONLY
10
6.65
6.78
-
lit
-
63
-
0.09
-
1
-
1
-
0.21
-
50
-
5
-
0.5
-
10
-
10
-
63
-
1
Well
matrix
Event
date
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
1 Result Flag
1 Result Flag
I Result Flag
I Result Flag
I Result Flag
I Result Flag
Result Flag
Result Fla
MW-308BR
WG
Round 2
919/2015
6.2
9.3
5300
5400
MW-310BR
WG
Round 1
6116120115
9.92
377
110
MW-310BR
WG
Round 2
919/2015
9.1
8.8
410
MW-311BR
WG
Round 1
6/29/2015
39.18
-
-
-
-
1200
580
MW-311BR
WG
Round 2
9/1112015
20.6
-
-
810
1100
540
MW-314SR
lWG
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
WIW2015
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
615/2015
3.12
11.44
2.1
11
-
MW-317BR
WG
Round 2
91812015
7.4
11:6
5.6
14.8
-
MW-318D
WG
Round 1
6/2/2015
10.63
5.51
-
-
1310
-
13
1
1150
577
MW-318D
WG
Round 2
9/912015
6.08
5.23
1300
6.7
720
430
MW-9
WG
Round 1
6130/2015
84.09
-
-
-
-
6.4
990
1000
MW-9D
WG
Round 1
612412015
66
-
1000
1.5
2600
600
MW-90
WG
Round 2
901I2015
48.29
6.44
-
-
1100
2.7
P 1400
1
1100
OW-303D
WG
Round 2
9112/2015
2.9
55
1000
15.i
53.2
14900
4500
OW-308D
WG
Round 1
6/25/2015
4.53
6.2
620
-
-
36400
580
OW-308D
WG
Round 2
W 11120151
8.5
6.2
759
34700
690
0W-3100
WG
Round 1
6/23/2015
2.28
-
-
-
-
809
1100
-
1.2
1400
1200
-
OW-310D
WG
Round 2
1 9111120151
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, strontlum), it is not shown on this table.
Orange Indicates concentration greater than PPBC
Green indicates concentration less than PPBC
pglL = micrograms per liter
SU = standard unit
J- = estimated concentration, biased low
J = laboratory estimated concentration
,1+= 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 = nephelomethc 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
Ng1L
0.2
1MAC
Vanadium
T
Ug1L
0-3
1MAC
Aal Dissolved Safi
N
Ng1L
500000
02L
Sulfate
N
NgIL
250000
02L
PPBC (Minimum (for rangesy):
PPBC:
-
0.2
1
-
260000
-
31000
Well
Matrix
Event
Hate
Result Flag
Result Flag
Result Flag
Result Fla
AB-10D
WG
Round 1
E12412015
1-5
-
AB-100
WG
Round 2
911112015
0.63
J
1320000
-
-
AB-10S
PW
Round 1
612612015
0.54
3
-
-
AB-10S
PW
Round 2
9/1112015
0.31
3.3
-
AB-10SL
PW
Round 1
6IM2015
14.6
-
AB-10SL
IPW
Round 2
9111/2015
0.44
30.7
AB-15S
PW
Round 1
6122/2015
3.4
254
-
-
AB-258R
WG
Round 1
612612015
-
5.5
AB-25BR
WG
Round 2
9/1112015
1-7
-
AB-250
WG
Round 1
612W2015
0.69
J
AB-25D
WG
Round 2
9112/2015
0.64
J
-
AB-25S
PW
Round 1
6126/2015
13.3
-
AB-25S
PW
Round 2
9/11/2015
1.5
689
AB-308R
WG
Round 1
6124/2015
0.91
ij
A13_308 R
WG
Round 2
911012015
0.67
J
-
AB-30D
W G
Round 1
6124)2015
0.86
J
AB-300
WG
Round 2
911112015
1-1
AB-30S
WG
Round 1
6129/2015
-
-
AB-30S
WG
Round 2
9/1012015
18.3
AB-35BR
WG
Round 1
612512015
1.8
-
AB-35BR
WG
Round 2
9110/2015
11
J
905000
J
AB-50
W G
Round 1
611812015
0.77
J
-
-
AB-50
WG
Round 2
9/912015
AB-5S
PW
Round 1
6119/2015
0.69
0.62
J
-
AB-5S
PW
Round 2
9/9/2015
1.6
33.7
AS-1010
WG
Round 1
6181W015
-
15.3
-
AS-100
WG
Round 2
918/2015
30.6
AS-12S
WG
Round 1
6/912015
1.1
-
AS- 12S
WG
Round 1
619/2015
_
AS-12S
WG
Round 2
918/2015
0.52
J
-
AS-21D
WG
Round 1
6117/2015
1.6
-
-
AS-21)
WG
Round 2
913/2015
-
1.4
-
-
-
AS-40
WG
Round 1
6/512015
4.8
-
AS-40
WG
Round 2
91W2015
AS-61)
WG
Round 1
6/8/2015
0.69
J-'
-
AS-60
WG
Round 2
9/8/2015
0.4
J
-
AS-8BR
WG
Round 1
619/2015
2.7
-
AS-88R
WG
Round 2
915/2015
-
-
-
AS-8D
WG
Round 1
612/2015
1.8B
J
-
AS-81)
WG
Round 2
919/2015
-
F-
BG-11)
WG
Round 3
11116/2015
45.8
6G-1 D
WG
Round 4
12/1512015
43
-
BG-5D
WG
Round 1
6123/2015
-
-
BG-5D
WG
Round 2
91912015
0.46
J
-
-
BG-51)
WG
Round 3
11/1612015
-
-
BG-50
WG
Round 4
12/15/2015
-
-
-
-
-
BG-5S
WG
Round 1
6/2412015
2.6
SG-5S
WG
Round 2
9/912015
0.82
J
BG-5S
WG
Round 3
1111612015
0.31
J
-
BG-5S
WG
Round 4
1205f2015
-
GWA-10D
WG
Round 1
614/2015
0.256
3.36
-
GWA-101)
WG
Round 1
6/26/2015
-
-
-
-
GWA-10D
WG
Round 2
91BY2015
1.3
GWA-110
WG
Round 1
6/512015
1.2
J+
GWA-11D
WG
Round 2
9/312015
0-45
J
-
GWA-115
WG
Round 1
6110/2015
0.52
J
-
GWA-11S
WG
Round 2
9/312015
Oka
J
-
GWA-12D
WG
Round 1
6/4/2015
5.65
-
-
GWA-120
WG
Round 2
9/912015
3.7
-
-
GWA-12D
WG
Round 3
1111912C15
-
3.1
-
-
-
GWA-12D
WG
Round 4
121M2015
2.3
-
GWA-12S
WG
Round 1
6/412015
-
-
-
-
GWA-12S
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
J
GWA-14D
WG
Round 2
91912015
0.62
J
-
GWA-14S
WG
Round 2
9/912015
0.48
J
GWA-150
WG
Round 1
613022015
1.5
-
705000
-
307000
GWA-1513
WG
Round 2
1 911DY2015
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
Ng1L
0.2
IMAC
Vanadium
T
Ug1L
0-3
IMAC
AM Dissolved Soli
N
Ng1L
500000
02L
Suitate
N
Ng1L
250000
02L
PPBC (Minimum (tor ranges)):
PPBC:
-
0.2
1
-
260000
-
31000
Well
Matrix
Event
Date
Result Flag
Result Flag,
Result Flag
Result Fla
GWA-1D
WG
Round 1
6111/2015
0.79
J
-
-
GWA-1D
WG
Round 2
9/8/2015
0.45
J
-
GWA-1S
WG
Round 1
6117/2015
1.5
-
-
GWA-1S
WG
Round 2
9191W015
0.39
J
-
GWA-2D
WG
Round 1
6/10/2015
0.57
J
-
-
GWA-20
1WG
Round 2
9/5/2015
0.65
J
GWA-2S
WG
Round 1
6111/2015
1.3
-
-
GWA-2S
WG
Round 2
9/4/2015
-
-
4.1
-
GWA-31)
WG
Round 1
6/412015
-
GWA-3D
WG
Round 2
9/4/2015
0.6
J
-
GWA-3S
WG
Round 1
61412015
GWA-3S
WG
Round 2
9I412015
0.56
J
-
GWA-41)
WG
Round 1
6123/2015
1.5
GWA-4D
WG
Round 2
9/912015
-
0.53
J
-
-
-
GWA-4S
WG
Round 1
60912015
0.6
1i
GWA-4S
WG
Round 2
911012015
4.3
-
GWA-5BR
WG
Round 1
6116/2015
0.49
J
873000
416000
GWA-5BR
WG
Round 2
9/9/2015
-
-
799000
362000
GW'A-6D
WG
Round 1
612912015
-
-
GWA-6D
WG
Round 2
9I1112015
-
-
-
GWA-6S
WG
Round 1
6/30/2015
6.5
-
-
GWA-6S
WG
Round 2
9/1212015
1.1
-
-
-
GWA-7D
WG
Round 1
6/1612015
-
GWA-7D
WG
Round 2
9AW2015
-
-
-
GWA-7S
WG
Round 1
611912015
0.38
J
GWA-7S
WG
Round 2
9110/2015
-
-
-
GW'A-8D
WG
Round 1
615/2015
5.2
690000
J-
368000
-
GWA-813
WG
Round 2
WW2015
1.3
726000
346000
-
GWA-8S
WG
Round 1
6118/2015
U.45
J
-
GWA-9D
WG
Round 1
611512015
1.8
-
GWA-91)
WG
Round 2
9/9/2015
-
GWA-9D
WG
Round 3
11116/2015
0.38
J
-
-
GWA-91)
WG
Round 4
12/1512015
0.39
J
-
GWA-9S
WG
Round 1
611912016
5.1
-
-
-
GWA-9S
WG
Round 2
91912015
0.59
J
-
-
GWA-9S
WG
Round 3
1111612015
0.65
J
GWA-9S
WG
Round 4
12/15/2015
-
0.74
J
-
MW-10
1WG
Round 2
9111/2015
-
-
MW-101)
WG
Round 1
6124/2015
-
MW-10D
WG
Round 2
911112015
-
MW-11
WG
Round 1
6/29/2015
2.6
-
MW-11
WG
Round 2
911112015
0.58
J
-
-
MW-11D
WG
Round 1
612912015
-
-
MW-11D
WG
Round 2
9111/2015
0.51
J
-
-
MW-12
WG
Round 1
612W2015
2.6
-
MW-12
1WG
Round 2
919/2015
-
-
MW-12❑
WG
Round i
6120/2015
1.4
MW-12D
WG
Round 2
919/2015
-
-
MW-20D
WG
Round 1
6/24/2015
0.41
J
-
MW-20S
WG
Round 1
6/2412015
-
-
-
MW-21D
WG
Round 1
6123/2015
-
639000
274000
MW-21 D
WG
Round 2
9/1012015
-
0.72
J
599000
-
269000
-
MW-21S
WG
Round 1
6124/2015
1.5
MW-213
IWG
Round 2
911W2015
0.76
J
MW-22BR
WG
Round 1
612512015
0.33
J
-
-
MW-22BR
WG
Round 2
9I1112015
1.2
-
MW-22S
WG
Round 1
6/2512015
0.74
J
-
MW-23BR
WG
Round 1
6/112015
0.55
1,38
-
MW-23BR
WG
Round 2
9/10/2015
-
MW-23BR
WG
Round 4
12/1512015
-
0.31
IJ
-
-
-
MW-23❑
WG
Round 1
61M2015
-
-
-
MW-23D
1VVG
Round 4
12/15/2015
1.2
-
-
-
MW-301BR
WG
Round i
6MV2015
1-8
MW-301BR
WG
Round 2
914/2015
0.81
J
-
MW-303BR
WG
Round 1
611212015
3.7
MW-303SR
WG
Round 2
9/412016
2
-
MW-306BR
WG
I Round 1
6112120151
1.6
530000
IOW-306SR
WG
I Round 2
9/4)20151
1.6
778000
J+
346000
-
MW-308BR
WG
I Round 1
1 6115120151
0.84
1 J
1 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
pg/L
0.2
IMAC
Vanadium
T
pg1L
0-3
IMAC
AM Dissolved Soli
N
pgfL
500000
02L
Sulfate
N
pg1L
250000
02L
PPBC (Minimum (for rangesf):
PPBC:
-
0.2
1
-
260000
-
31000
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Fla
MW-308DR
WG
Round 2
9/9/2015
-
1300000
586000
-
MW-3106R
WG
Round 1
61IW2015
2.5
-
-
MW-310BR
WG
Round 2
919I2015
3.7
-
MW-311BR
WG
Round 1
612912015
0.89
1
-
MW-311BR
WG
Round 2
9111/2015
0.62
J
-
MW-314BR
1WG
Round 1
6/25/2015
1.3
-
MW-314BR
WG
Round 2
9/11)2015
0.02
J
-
MW-315BR
WG
Round 1
6119/2015
1 1A
I-
MW-315BR
WG
Round 2
918/2015
5.5
MW-31TBR
WG
Round 1
61512015
8.4
-
-
MW-317BR
WG
Round 2
91812015
5.9
MW-3180
WG
Round 1
6/2/2015
0.654
J
-
MW-318D
WG
Round 2
91912015
_
MW-9
WG
Found 1
613U12015
2.3
-
-
-
-
-
MW-9D
WG
Round 1
6/24/2015
11.1
MW-90
WG
Round 2
9111/2015
23
-
-
-
OW-303D
WG
Round 2
9112/2015
0.56
36.5
OW-30813
WG
Round 1
1 6125/2015
-
-
-
OW-308D
WG
Round 2
9/11/2015
-
-
OW-3100
WG
Round 1
6/2312015
1.2
-
OW-3100
WG
Round 2
1 MW20151
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
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
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
5/2712015
9111/2015
9IM2015
9/1412015
911412015
9114/2015
9114/2015
9/14/2015
5/2712015
N
N
N
N
N
N
N
N
N
SW-1
DR-SW-1-NS-3015
DR-SW-10-NS-3015
DR-SW-10-WS-3Q15
DR-SW-11-NS-3Q15
DR-SW-12-NS-3015
DR-SW-I3-NS-30
DR-SW-13-NS-3015
SW-3
Constituent
CAS RN'
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Aluminum
7429-90-5
D
IL
43
100 U
100 U
100 U
10D U
100 U
12
Aluminum
7429-90-5
T
87
pIL
613
100 U
330
140
69 J
79 J
27600
Antimony
7440-36-0
D
IL
1.02
1.1
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Antimony
7440-36-0
T
640
pgIL
1.21
0.97
0.16 J
0.6 U
0.5 U
0-5 U
1 U
Arsenic
7440-38-2
D
150
pgIL
13.8
31.8
40.4
1.7
1.6
0.93
42.7
Arsenic
7440-38-2
T
10
u IL
15.5
37.9
49.4
2.1
1.8
1
63.7
Barium
7440-39-3
D
IL
20
110
34
27
26
23
42
Barium
7440-39-3
T
-
200000
IL
18
120
38
30
30
23
267
Beryllium
7440-41-7
D
6.5
pgIL
1 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1 'U
Beryllium
744041-7
T
IL
1 U
02 U
0.2 U
0.2 U
0.2 U
0.2 U
1.16
Boron
7440-42-8
D
pgIL
180
180
170
120
89
65
128
Boron
744042-8
T
-
-
jjgIL
157
190
160
130
100
62
107
Cadmium
7440-43-9
D
0.15
I&L
1 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
Cadmium
744043-9
T
-
IL
1 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
Calcium
7440-70-2
T
pqIL
19700
20800
2270D
20000
20400
19300
20000
Chromium
744047-3
D
11
jjgIL
1 U
0.25 J
0.26 J
0.2 J
0.2 J
0.34 J
1 U
Chromium
7440-47-3
T
pqIL
1 U
0.26 J
0.37 J
0.24 J
0.24 J
0.49 J
33.6
Cobalt
7440-48-4
D
-
pgIL
1 U
0.5 U
0.46 J
0.52
0.59
0.45 J
1 U
Cobalt
7440-48-4
T
4
IL
1 U
0.22 J
0.88
D.65
0.9
0,54
15.5
Copper
7440-50-8
D
2.7
pqIL
3.39 J+
0.52 J
2.8
8.7 J
10.7
2.4
1 UJ
Copper
7440-50-8
T
IL
4.75
0.3 J
0.63 J
0.54 J
0.61 J
0.65 J
27.3
Iron
7439-89-6
D
pgIL
21
50 U
50 U
50 U
50 U
50 U
40
Iron
7439-89-6
T
WgIL
323
220
630
310
240
240
42400
Lead
7439-92-1
D
0.54
p IL
1 U
022
0.26
0.85 J _
1.3
0.19
1 U
Lead
7439-92-1
T
wgIL
1 U
0.06 J
0.36
0.15
0.14
0.098 J
20.1
Magnesium
7439-95-4
T
jjgIL
7240
6680
6680
6390
6610
6370
5850
Manganese
7439-96-5
D
wqIL
16
59
400
250
270
150
584
Manganese
7439-96-5
T
-
IL
9
140
520
280
430
160
1820
Mercu
7439-97-6
T
0.012
IL
0.0011 J+
0.00778
0.00125
0.000988
0.000792
0.000671
0.00385 J+
Methane
74-82-8
N
IL
10 UJ
15
39.1
26.8
45.9
31.4
20 UJ
Molybdenum
7439-98-7
D
IL
9.11
10.8
9.1
5.7
4.1
2.7
2.56
Molybdenum
7439-98-7
T
2000
IL
9.36
9.7
8.6
6
4.5
2.7
9.85
Nickel
7440-02-0
D
16
IL
1.2
1.6
0.65
0.76
0.75
0.47 J
1 U
Nickel
7440-02-0
T
-
IL
2.5
1.6
0,72
0.62
0.63
0.53
15.9
Potassium
7440-09-7
T
IL
3090
5540
3620 J
2800 J
2660 J
5000 U
3710
Selenium
7782-49-2
D
-
pgIL
2.32
1.9
0.5 U
0.5 U
0.5 U
0-5 U
1 U
Selenium
7782-49-2
T
5
pgIL
2.87
2
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Sodium
7440-23-5
T
IL
11500
8890
13300
12700
11900
11100
10800
Strontium
7440-24-6
D
IL
322
290
310
240
220
210
264
Strontium
7440-24-6
T
-
40000
pgIL
320
300
300
250
250
200
302
Thallium
7440-28-0
D
IL
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
IL
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
IL
4.94
2.4
1 U
1 U
1 U
1 U
1.25
Vanadium
7440-62-2
T
IL
6.65
2.5
0.98 J
0.8 J
0.85 J
0.57 J
54.1
Zinc
7440-66-6
D
36
pgIL
34 J+
10 U
8.7 J
1 D U
10 U
12
5 UJ
Zinc
7440-66-6
T
-
wqIL
212
10 U
10 U
10 U
10 U
10 U
93
Total Dissolved Solids
TDS
N
pgIL
140000
136000
144000
135000
127000
124000
120000
Total Organic Carbon
TOC
N
IL
3800
4500
1100
1200
15400
1600
2200
Total Suspended Solids
TSS
N
IL
16000
3500
16000
2800
3500
2600 U
680000
Alkalinity, CO3
ALK-CO3
N
-
P91L
11000
5000 U
5000 U
5000 U
5000 U
5000 U
10000 U
Alkalinity, HCO3
ALK-HCO3
N
IL
23000
45400
85400
81900
72000
72800
51000
Alkalinity, lab
ALK-LAB
N
-
pgIL
37000
45400
85400 J-
81900 J-
72000 J-
72800 J-
51000
Chloride
16887-00-6
N
230000
IL
11000
8900
11600
11600
11500
11600
11000
Nitrite as N
14797-65-0
N
-
wqIL
29
-
-
-
-
-
76
Nitrogen, NO2 plus NO3
NO2-NO3
N
IL
47
28 J
32
25
Sulfate
14808-79-8
N
pgIL
53000
40200
20100
18100
14700
12900
23000
Sulfide
18496-25-8
N
IL
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
pgIL
-
-
47.4
-
1.51 J
1.83
0.658
-
-
Chromium
7440-47-3
T
IL
0.474 J
1 J
0.69 J
0.386 J
Iron
7439-89-6
T
kjqIL
155 J
216 J
199 J
195 J
Manganese
7439-96-5
D
WgIL
434 J
232 J
266 J
141 J
Manganese
7439-96-5
T
_
IL
-
425 J
277 J
291 J
156 J
As III
7784-46-5
T
WgIL
19.7
0.841 J
0.971
0.516
As V
10103-60-3
T
Il-
-
27.7
0.668 J
0.857
0.5 U
Chromium I
18540-29-9
T
IL
0.012 J
0.018 J
0.016 J
0.019 J
Fe II
1345-25-1
T
IL
-
30 UJ
11.4 J
30 UJ
16.1 J
Fe III
1309-37-1
T
pgIL
Mn II
134443-0
T
jjgIL
-
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 Namelll
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
5/2712015
9111/2015
9IM2015
9/1412015
911412015
9114/2015
9114/2015
9/14/2015
5/2712015
N
N
N
N
N
N
N
N
N
SW-1
DR-SW-1-NS-3015
DR-SW-10-NS-3015
DR-SW-10-WS-3Q15
DR-SW-11-NS-3Q15
DR-SW-I2-NS-3015
DR-SW-I3-NS-30
DR-SW-13-NS-3415
SW-3
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Mn IV
1313-13-9
T
IL
Se IV
10102-18-8
T
pg1L
-
2 U
-
2 U
2 U
2 U
Se(VI)
13410-01-0
T
IL
2 U
2 U
2 U
2 U
Dissolved Oxygen
DO
N
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 Conductivit field
SC
N
Sicm
219.1
200:9
-
Oxidation Reduction Potential
ORP
N
mV
125.7
148.8
Notes:
pglL = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
mglL = milligrams per liter
mV = millivolts
NTU - nephelometrio turbidity units
pCVL = 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
❑ = dissolved
Deg C = degree Celsius
❑HHS = 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
$W-4
SW4
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
611812015
9111/2015
5127/20/5
6/18/2015
9/1112015
5/27/2015
611812015
9/1112015
613012015
N
N
N
N
N
N
N
N
N
SW-3
DR-SW-3-NS-3015
SW-4
SW-4
DR-SW-4-NS-3Q15
SW-5
SW-5
DR-SW-5-NS-3015
SW-6
Constituent
CAS RN'
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Aluminum
7429-90-5
D
IL
100 J
5 U
100 U
5 U
100 U
Aluminum
7429-90-5
T
87
pIL
250
127
63 J
90
100 U
-
Antimon
7440-36-0
D
IL
0.5 J
1 U
0.5 U
1 U
0.41 J
0.17 J
Antimony
7440-36-0
T
640
pgIL
-
0.5 U
1 U
0.6 U
1 U
0.45 J
0.16 J
Arsenic
7440-38-2
D
150
pgIL
1.7
1 U
0.29 J
1 U
0.42 J
0.17 J
Arsenic
7440-38-2
T
10
u IL
2
1 U
0.14 J
1 U
0.48 J
0,24 J
Barium
7440-39-3
D
IL
27
18
20
24
17
19
Barium
7440-39-3
T
-
200000
IL
-
34
18
22
25
18
25
Beryllium
7440-41-7
D
6.5
pgIL
0.2 U
1 U
0.2 U
1 U
0.2 U
0.2 U
Beryllium
744041-7
T
IL
-
0.2 U
1 U
0.2 U
1 U
0.2 U
02 U
Boron
7440-42-8
D
pgIL
120
50 U
35 J
58
74
150
Boron
744042-8
T
-
-
jjgIL
120
50 U
29 J
57
72
160
Cadmium
7440-43-9
D
0.15
uaIL
0.08 U
1 U
0.08 U
1 U
0.08 U
0.08 U
Cadmium
744043-9
T
-
IL
0.08 U
1 U
0.08 U
1 U
0.08 U
0.08 U
Calcium
7440-70-2
T
pqIL
20800
14000
19500
13800
10700
6300
Chromium
744047-3
D
11
IL
-
0.21 J
1 U
024 J
1 U
0.25 J
0.49 J
Chromium
7440-47-3
T
IL
0.64
1 U
0.3 J
1 U
0.63
0.67
Cobalt
7440-48-4
D
-
IL
0.45 J
1 U
0.6 U
1 U
0.16 J
0.15 J
Cobalt
7440-48-4
T
4
IL
0,87
1 U
0.18 J
1 U
0.21 J
0.48 J
Copper
7440-50-8
D
2.7
p IL
8.6
7.38 J+
8.1
1 U
4.6
2.2
Copper
7440-50-8
T
IL
0.83 J
1 U
0.71 J
4.62 J+
1.2 J+
1.6
Iron
7439-89-6
D
pgIL
-
30 J
33
26 J
68
30 J
-
Iron
7439-89-6
T
WgIL
580
339
170
412
290
Lead
7439-92-1
D
0.54
p IL
1.1
1 U
1
1 U
0.38
0.2
Lead
7439-92-1
T
wgIL
0.37
1 U
0.087 J
1 U
0.14
0.88
Magnesium
7439-954
T
jjgIL
-
6160
4390
5940
5500
4110
2560
Manganese
7439-96-5
D
PqIL
210
90
23
315
89
22
Manganese
7439-96-5
T
-
IL
-
300
93
46
290
98
83
Mercu
7439-97-6
T
0.012
IL
0.0019 J+
0.000978 J+
0.00202 J+
0.0012 J+
0.00222 J+
0.00334 J+
Methane
74-82-8
N
IL
26.1
10 UJ
6.1 J+
10 UJ
47 J
9.9 J+
Molybdenum
7439-98-7
D
IL
5.9
1 U
0.49 J
1 U
0.61
0.39 J
Molybdenum
7439-98-7
T
2000
IL
5.3
1 U
0.46 J
1 U
0.59
0.26 J
Nickel
7440-02-0
D
16
IL
0.76
1 U
0.48 J
1 U
0.36 J
0.78
Nickel
7440-02-0
T
-
IL
-
0.96
1 U
0.36 J
1 U
OA5 J+
0.67
Potassium
7440-09-7
T
IL
2810 J
1410
500 U
2230
2510 J
5000 U
Selenium
7782-49-2
D
-
pgIL
-
0.5 U
1 U
0.5 U
1 U
0-5 U
0.5 U
Selenium
7782-49-2
T
5
pgIL
0.5 U
1 U
0.5 U
1 U
0.5 U
0.5 U
Sodium
7440-23-5
T
IL
13000
8640
10600
9210
7210
4010 J
Strontium
7440-24-6
D
IL
260
143
210
134
97
42
Strontium
7440-24-6
T
-
40000
pgIL
270
151
200
143
100
45
Thallium
7440-28-0
D
IL
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
IL
-
0.1 U
0.2 U
0.1 U
0.2 U
0.1 UJ
0.1 U
Vanadium
7440-62-2
D
IL
0.78 J
0.3 U
0.55 J
0.3 U
0.5 J
1.2
Vanadium
7440-62-2
T
IL
-
1.1
0.567
1 U
0.42
0.33 J
2.8
Zinc
7440-66-6
D
36
pgIL
10 U
17 J+
10 U
5 UJ
10 U
4.7 J
Zinc
7440-66-6
T
-
wqIL
10 U
5 U
10 U
5 U
10 U
5 J+
Total Dissolved Solids
TDS
N
pgIL
149000
97000
126000
110000
83000
72000
Total Organic Carbon
TOC
N
IL
-
1600
1500
2200
2700
4000
3300
Total Suspended Solids
TSS
N
IL
13100
5000 U
3900
5000 J
2500 U
24700
Alkalinity, CO3
ALK-CO3
N
-
P91L
-
5000 U
10000 U
5000 U
10000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
IL
69600
52000
67100
50DOO
34700
17600
Alkalinity, lab
ALK-LAB
N
IL
-
69600
52000
67100
50000
34700
17600
Chloride
16887-DO-6
N
230DOO
IL
12900
10000
13900
13000
9400
9400
Nitrite as N
14797-65-0
N
-
wqIL
-
145
-
300
-
-
Nitro en, NO2 plus NO3
NO2-NO3
N
IL
110 J-
260
Sulfate
14808-79-8
N
-
pgIL
15300
5900
5500
10000
6900
5100
Sulfide
18496-25-8
N
IL
10O U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
pgIL
-
-
-
-
-
-
-
Chromium
7440-47-3
T
IL
Iron
7439-89-6
T
pgIL
-
Manganese
7439-96-5
D
wgIL
Manganese
7439-96-5
T
_
IL
-
-
-
-
-
As III
7784-46-5
T
WgIL
11
0.054
0.144
As V
10103-60-3
T
IL
15.6
0.083
-
0.208
Chromium I
18540-29-9
T
IL
0.019
0.029
0.017
Fe II
1345-25-1
T
IL
27.9
9.3
-
30-2
Fe III
1309-37-1
T
IL
51.5 J+
11.7 J+
28.1 J+
Mn II
1344�3 0
T
IL
242 J-
4$.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
$W-4
SW4
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
611812015
9111/2015
5127/20/5
6/18/2015
9/1112015
5/27/2015
611812015
9/1112015
613012015
N
N
N
N
N
N
N
N
N
SW-3
DR-SW-3-NS-3015
SW-4
SW-4
DR-SW-4-NS-3Q75
SW-5
SW-5
DR-SW-5-NS-3015
SW-6
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Mn IV
1313-13-9
T
IL
15.3
8.9
12.1
Se IV
10102-18-8
T
pg1L
0.5 U
0.5 U
-
0.5 U
Se(VI)
13410-01-0
T
IL
0.5 U
0.5 U
0.5 U
Dissolved Oxygen
DO
N
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 Conductivit field
SC
N
Sicm
215.9
194.1
128
50.2
Oxidation Reduction Potential
1 ORP
N
mV
111.8
158.7
1
143.8
157.8
Notes:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometrEc turbidity units
pCVL = 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 (s
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
❑ = dissolved
Deg C = degree Celsius
❑HHS = 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
911012015
613012015
9110/2015
6130/2015
9/1012015
512712015
9111/2015
N
N
N
N
N
N
N
DR-SW-6-NS-3015
SW-7
DR-SW-7.NS-3015
SW-8
DR-SW-$-NS-3Q15
SW-9
DR-SW-9-NS-3015
Criteria Min
02B Class C
(range
Surface Water
Constituent
CAS RN'
Fraction
only)
Criteria
Unit
Aluminum
7429-90-5
D
IL
100 U
100 U
100 U
5 U
100 U
Aluminum
7429-90-5
T
87
pgIL
380
-
550
-
320
129
360
Antimony
7440-36-0
D
pqIL
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
IL
0.6 U
0.22 J
0.5 U
0.5 U
0.6 U
1 U
0.72
Arsenic
7440-38-2
D
150
pgIL
0.21 J
0.14 J
0.21 J
0.14 J
0.33 J
46.3
59
Arsenic
7440-38-2
T
10
P91L
0.37 J
0.24 J
0.35 J
022 J
0.2 J
51.1
75.9
Barium
7440-39-3
D
IL
20
18
20
19
20
88
92
Barium
7440-39-3
T
-
200000
kjqtL
26
29
25
24
24
99
120
Beryllium
7440-41-7
D
6.5
IL
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1 U
0.2 U
Beryllium
744041-7
T
-
pgIL
02 U
0.2 U
0.2 U
0.2 U
0.2 U
1 U
0.111
Boron
7440-42-8
D
jigIL
220
130
190
170
130
360
380
Boron
744042-8
T
-
P91L
240
130
180
180
160
364
400
Cadmium
7440-43-9
D
0.15
WgIL
0.08 U
0.08 U
0,08 U
0.08 U
0.08 U
1 U
0.08 U
Cadmium
744043-9
T
PgIL
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
744047-3
D
11
pgIL
0.3 J+
0�24 J
0.24 J+
0.46 J
0.84 J+
1 U
0.45 J
Chromium
7440-47-3
T
iluaVIL
0.87
0.68
0.9
0.59
0.41 J
1 U
1
Cobalt
7440-48-4
D
-
pgIL
0.6 U
0.5'U
0.13 J
0.5 U
0.43 J
1 U
0.5 U
Cobalt
7440-48-4
T
4
IL
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
pgIL
12 J+
2
2.8 J+
2.8
1.6 J+
1 U
0.23 J
Copper
7440-50-8
T
IL
1.4 J+
1.8
1.5 J+
1.3
3 J+
5.11 J+
1.7
Iron
7439-89-6
D
pgIL
140
-
41 J
-
29 J
IOU
50 U
Iron
7439-89-6
T
pgIL
1000
1200
800
140
550
Lead
7439-92-1
D
0.54
lj IL
0.26 J+
0.088 J
0.21 J+
0.061 J
0.62 J+
1 U
0.1 U
Lead
7439-92-1
T
-
IL
0.73
0.97
0.77
0.64
0.2 J+
1 U
0.83
Magnesium
7439-95-4
T
IL
3380
2480
3310
2580
3280
13500
14300
Manganese
7439-96-5
D
pqIL
52
16
50
15
63
35
5 U
Manganese
7439-96-5
T
IL
83
98
81
55
94
154
230
Mercu
7439-97-6
T
0.012
pqIL
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
IL
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
UaIL
0.65
0.26 J
0.56
026 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
IL
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
-
pgIL
0.5 U
0.5 U
0.5 U
0.5 U
0.6 U
1 U
0.36 J
Selenium
7782-49-2
T
5
pgIL
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
-
vgIL
6230
4260 J
6900
3900 J
7560
17000
18700
Strontium
7440-24-6
D
IL
57
41
54
43
53
883
1000
Strontium
7440-24-6
T
-
40000
PgIL
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
jjgIL
0.022 J
0.1 U
0.025 J
0.1 U
0.1 U
0.2 U
0.036 J
Vanadium
7440-62-2
D
IL
1
0.85 J
0.96 J
0.69 J
2.6
0.701
1.1
Vanadium
7440-62-2
T
IL
3
3.1
3.1
2.5
1
0:947
2.7
Zinc
7440-66-6
D
36
pqIL
10 UJ
10 U
13 J+
10 U
13 J+
18 J+
10 U
Zinc
7440-66-6
T
-
IL
10 U
20 J+
10 U
4.6 J+
61
10
16
Total Dissolved Solids
TDS
N
pqIL
71000
74000
63000
73000 J
68000
270000
290000
Total Organic Carbon
TOC
N
pgIL
2400
3500
2600
5900
2400
2100
1600
Total Suspended Solids
TSS
N
pqIL
16100
24500
17100
19200
13300
32000
35200
Alkalinity, CO3
ALK-CO3
N
-
pgIL
6000 U
5000 U
5000 U
5000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
IL
22500
16800
24200
18300
23200
100000
114000
Alkalinity, lab
ALK-LAB
N
-
IL
22500
16800
24200
18300
23200
100000
114000
Chloride
16887-00-6
N
230000
IL
13000
9400
12100
9800
11600
13000
14500
Nitrite as N
14797-65-0
N
-
IL
-
-
-
-
-
132
-
Nitro en, NO2 plus NO3
NO2-NO3
N
L
380
310
460
270
650
210 J-
Sulfate
14808-79-8
N
-
PqIL
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
pgIL
-
-
-
-
-
-
-
Chromium
7440-47-3
T
L
Iron
7439-89-6
T
L
-
-
Manganese
7439-96-5
D
wCJIL
Manganese
7439-96-5
T
IL
-
-
-
As III
7784-46-5
T
pqIL
As V
10103-60-3
T
IL
-
-
Chromium I
18540-29-9
T
pqIL
Fe II
1345-25-1
T
pgIL
-
-
Fe III
1309-37-1
T
ILL
1344�30
T
-
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
911012015
613012015
9110/2015
6130/2015
9/1012015
512712015
9111/2015
N
N
N
N
N
N
N
DR-SW-6-NS-3015
SW-7
DR-SW-7.NS-3015
SW-8
DR-SW-$-NS-3Q15
SW-9
DR-SW-9-NS-3015
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Mn IV
1313-13-9
T
IL
Se IV
10102-18-8
T
pg1L
-
-
Se(VI)
13410-01-0
T
I
ua/L
Dissolved Oxygen
DO
N
mc#L
-
7.68
T95
619
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 Conductivity field
Sc
NVS/cm
1
1 49
120.1
502
123.1
453.9
Oxidation Reduction Potential
ORP
N
mV
1
1 199.9
157.3
203.7
193.8
90.3
Notes:
pg1L = micrograms per liter
pS1cm = micros iemens per centimeter
It = feet
mg1L = milligrams per liter
mV = millivolts
NTU - nephelometrio turbidity units
pCVL = 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 (s
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
❑ = dissolved
Deg C = degree Celsius
❑HHS = 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 NamellD:
S-1
S-1
S-1
S-2
S-3
S.6
Round 1
Round 1
Round 2
Round 2
Round 2
Round 3
512712015
612612015
9/12/2015
9/14/2015
9/14/2015
1112412015
N
N
N
N
N
N
S-1
S-1
DR-S.1-NS-3015
DR-S-2-NS-3015
DR-S-3-NS-3015
DR-S-E-NS-4Q15-1
Constituent
CAS RN
Fraction
Criteria Min
(range
(range
only)
NCDE002L
GWQS, MI
DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
IL
5 U
10O U
100 U
100 U
100 U
Aluminum
7429-90-5
T
pgIL
3410
4300
280
640
120
Antimony
7440-36-0
D
-
IL
1 U
0.34 J
0.5 U
0.25 J
0.5 U
Antimony
7440-36-0
T
1
IMAC
pgIL
1 U
0.45 J
0.5 U
0.26 J
0.5 U
Arsenic
7440-38-2
D
-
p IL
1 U
7.5
0.5 lJ
1.7
207
Arsenic
7440-38-2
T
10
02L
p IL
1.68
14.1
0.16 J
2.3
204 J+
Barium
7440-39-3
D
-
p IL
20
50
40
55
50
Barium
7440-39-3
T
700
02L
jjqIL
54
160
42
62
53
Be lium
7440-41-7
D
-
wqIL
1 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
pqIL
1 U
1.1
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
-
p IL
50 U
290
220
260
280
Boron
7440-42-8
T
700
02L
pqIL
50 U
240
210
260
300
Cadmium
7440-43-9
D
IL
1 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
pgIL
1 U
0.085
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
IL
14400
25200 J-
16900
21000
29800
Chromium
7440-47-3
❑
-
pqIL
1 U
0.22 J+
0.21 J
0.39 J
0.25 J+
Chromium
7440-47-3
T
10
02L
IL
3.86
17.6
0.28 J
0.42 J
0.81 J+
Cobalt
7440-48-4
D
IL
1 U
3.1 J+
0.37 J
1.1
0.7
Cobalt
7440-48-4
T
1
IMAC
p IL
4.88
17.5
0.5 J
1.9
0.88
Copper
7440-50-8
❑
-
pgIL
5.62
1.4 J+
1 U
1 A
1 U
Copper
7440-50-8
T
1000
02L
IL
6.15 J+
13.4 J+
0.24 J
0.43 J
0.41 J
Iron
7439-89-6
D
IL
18
190
50 U
36 J
140
Iron
7439-89-6
T
300
02L
p IL
5720
7700
390
970
330
Lead
7439-92-1
D
IL
1 U
0.16 J+
0.052 J
0.11
0.051 J+
Lead
7439-92-1
T
15
02L
p IL
3.97
16.2
0.28
0.71
0.25
Magnesium
7439-954
T
IL
4500
8430
5260
5860
6690
Manganese
7439-96-5
D
p IL
107
640
87
350
1100
Manganese
7439-96-5
T
50
02L
p IL
829
940
89
380
1100
Mercury
7439-97-6
T
1
02L
IL
0.0005 UJ
0.00845
0.00154
0.00583
0.00231 J+
Methane
74-82-8
N
-
pq1L
1 10 UJ
219
16.6
143
161 J
Molybdenum
7439-98-7
❑
P91L
1.25
18.9
0.33 J
15.2
21.1
Molybdenum
7439-98-7
T
pqIL
1.57
12.3
0.31 J
13.6
18.8
Nickel
7440-02-0
D
IL
1 U
1 J+
0.36 J
0.81
0.64
Nickel
7440-02-0
T
100
02L
pqIL
3.3
10.6 J+
0.39 J
0.86
0.91 J+
Potassium
7440-09-7
T
-
p IL
1590
4120 J
4800 J
5270
5820
Selenium
7782-49-2
D
IL
1 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
pgIL
1 U
2.1
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
IL
9070
16900
13800
15400
15100
Strontium
7440-24-6
❑
IL
157
330
240
300
460
Strontium
7440-24-6
T
PqIL
166
380
240
300
470
Thallium
7440-28-0
D
-
p IL
0.2 J
0.1 J
0.022 J
0.1 J
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
pqIL
0.2 U
0.16
0.031 J
0.044 J
0.028 J+
Vanadium
7440-62-2
D
IL
0.3 U
1.6
1 U
0.3 J
0.35 J
Vanadium
7440-62-2
T
0.3
IMAC
p IL
8.06
41.8
0.52 J
1.7
0.89 J
Zinc
7440-66-6
D
-
wqIL
11 J+
13 J+
6.7 J
10
10 u
Zinc
7440-66-6
T
1000
021-
pqIL
17
26
6.6 J
10 U
10 U
Total Dissolved Solids
TDS
N
500000
02L
p IL
99000
154000
128000
127000
158000
Total Organic Carbon
TOC
N
IL
2100
6700
900 J
650 J
670 J+
Total Suspended Solids
TSS
N
11-
180000
4360000
3700
44000
24700
Alkalinity. CO3
ALK-CO3
N
pgIL
10000 LI
5000 UJ
5000 U
5000 U
5000 t1
Alkalinity, HCO3
ALK-HCO3
N
JqIL
51000
72500
39300
56700
107000
Alkalinity, lab
ALK-LAB
N
-
IL
51000
72500
39300 J-
56700 J-
107000
Chloride
16887-00-6
N
250000
02L
IL
10000
11800
11700
11700
10700
Nitrite as N
14797-65-0
N
1000
02L
IL
117
-
Nitro en, NO2 plus NO3
NO2-NO3
N
IL
-
20'U
28
34
140
Sulfate
14808-79-8
N
250000
02L
ppIL
9400
32600
34600
29100
18100
Sulfide
18496-25-8
N
IL
200 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
p IL
-
-
0.275 J
1.17 J-
214
Chromium
7440-47-3
T
10
02L
IL
0.56 J
1.36 J
1.32
Iron
7439-89-6
T
300
02L
p IL
212 J
237 J
1520 J
Manganese
7439-96-5
D
IL
-
83.3 J
381 J
1120
Manganese
7439-96-5
T
50
02L
p IL
-
77.4 J
380 J
2100 J
As(III)
7784-46-5
T
-
IL
0.402
0.156 J
0.889
146
As V
10103-60-3
T
IL
0.195
0.5 U
0.279 J
67.5
Chromium (VI)
18540-29-9
T
0.07
DHHS
p IL
0.022 J+
0.011 J
0.0092 J
0.016 J-
Fe II
1345-25-1
T
IL
20 U
32.5 J
27.8 J
166 J
Fe Ili
1309-37-1
T
IL
29.9
-
-
-
Mn II
1344-43-0
T
IL
229
IV
1313-13-9
T
1 UJMn
-
-
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 NamellD:
S-1
S-1
S-1
S-2
S-3
S-6
Round 1
Round 1
Round 2
Round 2
Round 2
Round 3
512712015
612612015
9/12/2015
9/14/2015
9/14/2015
1112412015
N
N
N
N
N
N
S-1
S-1
DR-S-I-NS-3015
DR-S-2-NS-3015
DR-S-3-NS-3015
DR-S-E-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
IL
0.5 lJ
2 U
2 U
2 U
Se Vl)
13410-01-0
T
1L
0.5 U
-
2 U
2 U
2 U
Dissolved Oxygen
DO
N
m iL
7,02
2.3
4.71
7.02
-
Temperature
TEMP
N
-
Deg C
24.9
17.1
17.3
17.1
H
PH
N
6.5
8.5
02L
SU
7,65
7.5
6.89
7.1
-
ITurbidity, field
TURB
N
NTU
5,17
19.74
71
45.89
S ecific Conductiv�it field
SC
N
Slcm
173.8
255.7
18
207.8
-
Oxidation Reduction Potential
ORP
N
1 208.6
1 127.9
112
139.3
Notes:
pg1L = micrograms per liter
pSfcm = microsiemens per centimeter
It = feet
mg1L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCVL. = 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
028 = 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
TOG = 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
CCSWO02OUT
DRRC001
DRRC001
Round 1
Round 1
Round 2
Round 1
Round 2
71112015
7/112015
911412015
711/2015
911412015
FD
N
N
N
N
CCSWOUI-DUP
CCSW001
DR-CCSW002OUT-NS-3Q1
DRRC001
DR-DRRC001-NS-3Q15
Constituent
CAS RN
Fraction
SWQS Criteria
NCDEQ 02S
GWQS Criteria.
NCDEQ 02L
Unit
Aluminum
7429-90-5
D
-
-
wit.
-
100 U
100 U
Aluminum
7429-90-5
T
-
87
-
-
IL
-
3500
-
2300
Antimony
7440-36-0
D
-
-
-
-
/L
0.3 J
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
-
640
-
1
1L
0,24 J
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
D
-
150
-
-
1L
0.42 J
0.16 J
0.32 J
0.38 J
Arsenic
7440-38-2
T
-
10
-
10
1L
0.35 J
0.58
0.35 J
1.9
Barium
7440-39-3
D
-
-
-
-
1L
-
27
72
50
46
Barium
7440-39-3
T
-
200000
700
1L
-
33
120
53
86
Beryllium
7440-41-7
D
-
6.5
-
1L
-
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
-
-
4
fL
-
0.2 U
0.21
0.2 U
0.25
Boron
7440-42-8
D
-
-
-
-
1L
-
50 U
39 J
130
160
Boron
7440-42-8
T
-
-
700
1L
-
28 J+
38 J
130 J+
160
Cadmium
7440-43-9
D
-
0.15
-
1L
-
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
-
-
-
2
1L
-
0.08 U
0.08 U
0.08 U
0.05 J
Calcium
7440-70-2
1 T
-
-
-
1L
-
14700
30800
19000
19800
Chromium
7440-47-3
D
11
-
1L
-
0.44 J
0.33 J
0.32 J
0.2 J
Chromium
7440-47-3
T
-
-
10
1L
-
0.22 J
2
0.25 J
0.93
Cobalt
7440-48-4
D
-
-
-
/L
-
0.32 J
0.31 J
1.4
0.63
Cobalt
7440-484
T
4
-
1
/L
-
0.34 J
4.6
1.5
3.6
Copper
7440-50-8
D
2.7
-
-
1L
-
0.88 J
7.5
0.45 J
7.3
Copper
7440-50-8
T
-
-
1000
IL
-
0.95 J
3.8
0.49 J
2.4
Iron
7439-89-6
D
-
-
-
1L
-
-
50 U
-
100
Iron
7439-89-6
T
-
-
300
1L
-
-
5200
-
9900
Lead
7439-92-1
D
0.54
-
-
/L
-
0.12
0.78
0.1 U
0.76
Lead
7439-92-1
T
-
15
1L
-
0.09 J
1.6
0.092 J
2.5
Magnesium
7439-95-4
T
-
-
1L
-
2210
11700
12200
13300
Manganese
7439-96-5
D
-
-
IL
-
83
250
2100
1000
Manganese
7439-96-5
T
-
50
1L
-
160
1400
2200
1500
Mercury
7439-97-6
T
0.012
1
1L
-
0.000623
0.011
0,000684
0.0425
Methane
74-82-8
N
-
-
IL
-
8 J+
2.6 J+
23.7
30.5
Molybdenum
7439-98-7
D
-
-
-
1L
-
1.5
0.47 J
0.36 J
0.33 J
Molybdenum
7439-98-7
T
2000
-
1L
-
1.4
0.5 U
OX J
0.15 J
Nickel
7440-02-0
D
16
-
1L
-
0.54
1
1.7
1.3
Nickel
7440-02-0
T
-
100
1L
-
0.7
3.7
1.9
2.6
Potassium
7440-09-7
T
-
-
1L
-
4750 J
12200
5000 U
5000 U
Selenium
7782-49-2
❑
-
-
1L
-
0.85
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
5
20
1L
-
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
-
-
-
1L
-
11100
12200
19400
21000
Strontium
7440-24-6
❑
-
-
-
1L
-
65
160
240
230
Strontium
7440-24-6
T
-
40000
-
1L
-
68
170
250
270
Thallium
7440-28-0
D
-
-
-
1L
-
0.091 J
0.1 U
0.1 U
0.1 U
Thallium
7440-28-0
T
-
0.47
0.2
1L
-
0.025 J
0.1 U
0.036 J
0.026 J
Vanadium
7440-62-2
D
-
-
-
1L
-
0.56 J
0.49 J
1 U
1 U
Vanadium
7440-62-2
T
-
0.3
1L
-
d.55 J
3.3
0.29 J
2.6
Zinc
7440-66-6
D
36
-
1L
-
10 U
5.3 J
6.8 J
5 J
Zinc
7440-66-6
T
-
-
1000
IL
-
10 U
33
5 J
36
Total Dissolved Solids
TDS
N
-
-
500000
fL
-
112000
177000
186000
185000
Total Organic Carbon
TOC
N
-
-
-
1L
-
6000
2500
12500
2700
Total Suspended Solids
TSS
N
-
-
-
1L
-
4200 U
183000
2500 U
363000
Alkalinity, CO3
ALK-0O3
N
-
-
-
1L
-
5000 U
5000 U
5000 U
5000 UJ
Alkalinity, HCO3
ALK-HCO3
N
-
-
-
1L
-
22300
117000
70900
82000
Alkalinity, lab
ALK-LAB
N
-
-
-
1L
-
22300
117000
70900
82000
Chloride
16887-00-61
N
230000
-
250000
1L
-
16400
7000
12600
14000
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
-
-
-
wq1L
-
22
300
170
110
Sulfate
14808-79-8
N
-
-
-
250000
1L
-
22900
15400
38400
46000
Sulfide
18496-25-8
N
-
-
-
1L
-
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
-
10
1L
-
-
0.5 U
-
0.203 J
Chromium
7440-47-3
T
-
-
10
/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 NameIID:
CCSW001
CCSW001
CCSWO02OUT
DRRC001
DRRC001
Round 1
Round 1
Round 2
Round 1
Round 2
7/1/2015
7/1/2015
911412015
71112015
911412015
FD
N
N
N
N
CCSW001-DUP
CCSW001
DR-CCSW0020UT-NS-3Q1 5
DRRC001
DR-DRRC001 -NS-3Q1 5
Constituent
CAS RN
Fraction
SWQS Criteria
NCDEQ 02B
GWQS Criteria
NCDEQ 02L
Unit
Iron
7439-89-6
T
-
300
IL
-
-
266 J+
2210 J
Manganese
7439-96-5
D
-
-
IL
-
-
249 J
1100 J
Manganese
7439-96-5
T
-
-
50
IL
-
-
417 J
-
1220 J
As III
7784-46-5
T
-
-
-
IL
0.2 U
0.2 U
0.5 U
0.24
0.325 J+
As V
10103-60-3
T
-
-
IL
0.2 U
0.2 U
0.5 U
0.2 U
0.5 U
Chromium VI
18540-29-9
T
-
-
0.07
IL
0.041
0.056
0.14
0.05 UJ
0.0093 J
Fe II
1345-25-1
T
-
-
-
IL
23 J
7 J
30 UJ
213
25.5 J+
Fe III
1309-37-1
T
-
-
-
/L
74.9 J
103 J
-
253
-
Mn II
1344-43-0
T
-
-
IL
62.9
71.1
-
2470
-
Mn IV
1313-13-9
T
-
-
-
/L
62.1 J
49.5 J
-
0.74
-
Se IV
10102-18-8
T
-
-
-
-
IL
0.5 U
0.5 U
2 U
0.5 U
2 U
Se VI
13410-01-0
T
-
-
-
IL
0.5 U
0.5 U
2 U
0.5 U
2 U
Dissolved Oxygen
DO
N
-
-
m 1L
-
4.65
7A
3.89
5.12
Temperature
TEMP
N
-
-
-
-
Deg C
-
29.7
18.5
23
18.6
H
PH
N
6
1 9
6.5
8.5
SU
-
8.05
7.5
7.2
7.4
Turbidity, field
TURB
N
-
-
-
-
NTU
-
5A7
130.2
4.21
115.E
Specific Conductivity field
Sc
N
-
-
S/=
-
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
pSlcm = microsiemens per centimeter
It = feet
mV = millivolts
NTU - nephelometric turbidity units
pCi1L = 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 2-4 Ash Basin Water Analytical Results - Round 1 and Round 2
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name11D:
SW-1
SW-1
SW-9
SW-9
Round i
Round 2
Round 1
Round 2
512712015
9/11/2015
512712015
9111/2015
N
N
N
N
MAI
DR-SW-I-NS-3015
SW-9
DR-SW-9-NS-3015
Constituent
CAS RN
Fractio
SWQS Criteria
NCDEQ 02B
GWQS Criteria
NCDEQ 02L
Unit
Alurninurn
7429-90-5
D
-
u 11
43
100 U
5 U
100 U
Aluminum
7429-90-5
T
87
u ll
613
100 U
129
360
Antimony
74,40-36-0
❑
-
u !1
1.02
1.1
1 U
0.58
Antimony
7440-36-0
T
640
1
u /I
1.21
0.97
1 U
0,72
Arsenic
7440-38-2
D
150
u 11
13.8
31.8
46.3
59
Arsenic
7440-38-2
T
10
10
u 11
15.5
37.9
51.1
75.9
Barium
7440-39-3
D
u 11
20
110
88
92
Barium
7440-39-3
T
200000
700
u 11
18
120
99
120
Beryllium
7440-41-7
D
6.5
-
u 11
1 U
0.2 U
1 U
0.2 U
Beryllium
7440-41-7
T
-
4
u 11
1 1 U
0.2 U
1 U
0.11 J
Boron
7440-42-8
D
-
u 11
180
180
360
380
Boron
7440-42-8
T
-
1 700
u II
157
190
364
400
Cadmium
744043-9
❑
0.15
-
u 11
1 U
0.08 U
1 U
0.08 U
Cadmium
7440-43-9
T
-
2
u II
1 U
0.08 U
1 U
0,08 U
Calcium
7440-70-2
T
-
u 11
19700
20800
45400
51600
Chromium
7440-47-3
❑
11
-
u 11
1 U
0.25 J
1 U
0.45 J
Chromium
744047-3
T
10
u 11
1 U
0.26 J
1 U
1
Cobalt
7440-48-4
D
-
-
u 11
1 U
0.5 U
1 U
0.5 U
Cobalt
74,40-48-4
T
4
1
u 11
1 U
0,22 J
1 U
0,74
Copper
7440-50-8
D
2.7
-
u 11
3.39 J+
0,52 J
1 U
0,23 J
Copper
7440-50-8
T
1000
u 11
4.75
0.3 J
5.11 J+
1.7
Iron
7439-89-6
D
-
u 11
21
50 U
10 U
50 U
Iron
7439-89-6
T
-
300
u 11
323
220
140
00
Lead
7439-92-1
❑
0.54
-
u 11
1 U
0,22
1 U
0.1 U
Lead
7439-92-1
T
15
u 11
1 U
0.06 J
1 U
0.83
Magnesium
7439-95.4
T
-
-
u 11
7240
6680
13500
14300
Manganese
7439-96-5
❑
u 11
16
59
35
5 U
Manganese
7439-96-5
T
-
50
u 11
9
140
154
230
Mercury
7439-97-6
T
0.012
1
u 11
0,0011 J+
0.00778
0.000949 J+
0.0011 J+
Methane
74-82-8
N'
-
u 11
10 UJ
15
10 UJ
164
Molybdenum
7439-98-7
D
ug11
9.11
10.8
7.62
9.4
Molybdenum
7439-98-7
T
2000
u 11
9,36
9,7
7.65
9,8
Nickel
7440-02-0
D
16
-
u 11
1.2
1.6
1 U
0.7
Nickel
7440-02-0
T
-
100
u 11
2.5
1,6
1,16
1.6
Potassium
7440-09-7
T
-
u /I
3090
5540
4690
5840
Selenium
7782-49-2
D
-
-
u II
2,32
1.9
1 U
0.36 J
Selenium
778249-2
T
5
20
u 11
2.87
2
1 U
0.45 J
Sodium
7440-23-5
T
-
-
u II
11500
8890
17000
18700
Strontium
7440-24-6
D
u 11
322
290
883
1000
Strontium
7440-24-6
T
40000
u 11
320
300
895
1100
Thallium
7440-28-0
D
-
u 11
0.2 U
0.021 J
0.2 U
0,017 J
Thallium
7440-28-0
T
-
0,47
0.2
u 11
0.2 U
0.019 J
0.2 U
0.035 J
Vanadium
74,40-62-2
D
-
-
u 11
4.94
2.4
0.701
1.1
Vanadium
7440-62-2
T
-
-
0.3
u 11
6,65
2.5
0.947
2.7
Zinc
7440-66-6
D
36
-
u 11
34 J+
10 U
18 J+
10 U
Zinc
7440-66-6
T
1000
u 11
212
10 U
10
16
Total Dissolved Solids
TDS
N
500000
u /I
140000
136000
270000
290000
Total Organic Carbon
TOC
IN
-
u 11
3800
4500
2100
1600
Total Suspended Solids
TSS
N
u 11
16000
3500
32000
35200
Alkalinity. CO3
ALK-0O3
IN
u 11
11000
5000 U
10000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
u 11
23000
45400
100000
114000
Alkalinity, lab
ALK-LAB
N
-
-
u 11
37000
45400
100000
114000
Chloride
16887-00-6
N
-
230000
250000
u /l
11000
8900
13000
14500
Nitrite as N
14797-65-0
N
-
1000
u 11
29
-
132
-
Nitro en, NO2 plus NO3
NO2-NO3
N
-
u /I
-
-
-
210 J-
Sulfate
14808-79-8
N
250000
u 11
53000
40200
90000
90300
Sulfide
18496-25-8
IN
-
u 11
100 U
100 U
100 U
100 U
Dissolved Oxygen
DO
N'
-
mg/1
2.5
-
7,8
Temperature
TEMP
N
-
-
-
Deg C
27.4
28.5
H
PH
N
6
9
6.5
1 8.5
SU
7.3
7,6
Turbidity, field
TURB
N
NTU
5.61
17.9
Spec is Conductivity field
SG
I N
-
pSlom
2191
11
453,9
Oxidation Reduction Potential
ORP
I N
-
-
mV
125.7
1 -
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 Name1ID:
SW-1
SW-1
SW-9
SW-9
Round i
Round 2
Round 1
Round 2
512712015
9/11/2015
512712015
9111/2015
N
N
N
N
SW-1
DR-SW-I-NS-3015
SW-9
DR-SW-9-NS-3015
Constituent CAS RN I Fractio I SWQS Criteria NCDEQ 028 I GWQS Criteria I NCDEQ 02L I Unit
Notes:
pm = micron
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
mg1L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCVL = 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 2-5 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-1D
BG-1D
BG-5D
BG-5D
BG-5D
BG-50
8G-5S
BG-5S
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
1111612015
1211512015
612312015
9/912015
1111612015
17J1512015
6124/2015
9/9/2015
N
N
N
N
N
N
N
N
DR-BG-ID-NS-4015-1
Df7-BG-ID-NS-4015-2
BG-5D
DR-BG-SD-NS-3015
DR-BG-5D-NS-4015-1
DR-BG•5D-NS-4Q15-2
BG-5S
DR-BG•5S-NS-30115
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
IL
1600
700
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
pWL
1000
760
60 J
220
100 U
100 U
590
720
Antimony
7440-36-0
D
PqfL
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
P91L
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
2A
2.2
0.17 J+
0.50 U
0.5 J
0.5 U
0.5 U
0.50 U
Arsenic
7440-38-2
T
10
02L
pWL
2A
2.3
0.5 U
0.50 U
0.5 U
0.5 U
0.28 J
029 J
Barium
7440-39-3
D
3 J
5 U
24
19
17
15
10
12
Barium
7440-39-3
T
700
02L
P91L
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
PWIL
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
IL
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
PWL
0.08 J
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
PPJL
66800
63600
32400
30700
25600
28300
17100
21000
Chromium
7440-47-3
D
-
PWIL
20.4
14.7
0.28 J+
0.60 U
0.72 J+
0.29 J
1.2 J+
0.29 J
Chromium
7440-47-3
T
10
02L
P91L
25.3
16.1
0.38 J+
0.47 J
0.48 J+
0.18 J+
2.6
0.89
Cobalt
744048 1
D
-
L
0.32 J
0.3 J
0.91
0.30 J
0.5 U
0.6 U
0.5 U
0-60 U
Cobalt
7440-48-4
T
1
IMAC
L
0.38 J
0.33 J
1
0.41 J
0.5 U
D.5 U
2.1
0.91
Copper
7440-50-8
D
L
1 3.8 J+
3A
0.36 J+
0.47 J
9.8 J+
9.4
0.28 J+
0.39 J
Copper
7440-50-8
T
1000
02L
uaWfL
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
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
12 J+
1
0.1 UJ
0.10 U
Lead
7439-92-1
T
15
021-
PqJL
0.1 U
0.047 J+
0.078 J
0,27
0.08 J
0.055 J
1.7
0.76
Magnesium
7439-96 4
T
-
P91L
74.7 J
237
17400
16700
14900
15900
11500
14000
Manganese
7439-96-5
D
pgfL
5 U
5 U
920
540
110
120
21
20
Manganese
7439-96-5
T
50
02L
u L
1 5 U
5 U
910
580
100
130
110
120
Mercu
7439-97-6
D
L
0.2 U
0.2 U
0.2 J
0.20 U
0.2 U
0.2 U
0.2 U
0.20 U
Mercury
7439-97-6
T
1
02L
l
02 U
0.2 U
0.2 J
0.20 U
02 U
0.2 U
0.2 U
0.20 U
Methane
74-82-8
N
P91L
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
P91L
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
pgfL
18
16.5
1.2
0.55
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
ucUL
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
-
IL
6500
6360
3170 J
5000 U
5000 U
5000 U
6000 U
5000 U
Selenium
7782-49-2
D
pWL
0.88
0.88
0.5 U
0.50 U
0.5 U
0.5 U
0.5 J
0.50 U
Selenium
7782-49-2
T
20
02L
P91L
1.2
0:9
0.5 U
0.50 U
0.5 U
0.5 U
0.5 J
0.50 U
Sodium
7440-23-5
T
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
PQIL
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
KVIL
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
P91L
45.6
43
1 U
0.46 J
1 U
1 U
2.6
0.62 J
Zinc
7440-66-6
D
-
lJQjL
12
10 U
10 U
3.1 J
10 U
10 U
10 UJ
5.5 J
Zinc
7440-66-6
T
1000
02L
pc#L
10 U
10 J+
10 u
10 U
3.3 J+
6.1
5.1 J+
5.1 J
Total Dissolved Solids
TDS
N
500000
021-
IL
1 309000
338000
214000
212000
164000
204000
175000
191000
Total Organic Carbon
TOC
N
l-
1 1800
2000
620 J
1000 U
10DO U
23800
570 J
1000 U
Total Suspended Solids
TSS
N
PWL
2500 U
10800
2900
5200
2500 U
2500 U
-
62900
Alkalinity, CO3
ALK-CO3
N
PPJL
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-CAB
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
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
pcSL
310
300
26 J+
140
180
120
400 J+
360
Sulfate
14808-79-8
N
250000
02L
pg1L
86800
92400
39400
34900
34500
343DO
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
021-
Iron
7439-89-6
T
300
02L
h L
-
-
-
-
Man anese
7439-96-5
D
L
Manganese
7439-96-5
T
50
02L
L
-
-
-
-
As III
7784-46-5
T
uoll-
As(V)10103-60-3
T
L
-
-
-
-
-
Chromium VI
18540-29-9
T
0.07
DHHS
P91L
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 It
1344-43-0
T
l
-
-
-
I -
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-1D
BG-1D
BG-5D
BG-5D
BG-5D
BG-50
8G-5S
BG-5S
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
1111612015
1211512015
612312015
9/912015
1111612015
17d1512015
6124/2015
9/9/2015
N
N
N
N
N
N
N
N
DR-BG-ID-NS-4015-1
DR-BG-ID-NS-4015-2
BG-5D
DR-BG-SD-NS-3015
DR-BG-5D-NS-4015-1
DR-BG•5D-NS-4Q15-2
BG-5S
DR-BG•5S-NS-30115
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Mn IV
1313-13-9
T
IL
Se IV
10102-18-8
T
pg1L
-
-
-
Se(VI)
13410-01-0
T
pgfL
Uranium, Natural
7440-61-1
T
PCOL
-
1.13
-
0.135 J
Radium-226
13982-63-3
T
9 L
0.897
1.22
Radium-228
15262-20-1
T
-
Ci1L
-
1.46
-
3 U
Uranium-233
13968-55-3
T
L
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
PWIL
0.05 U
0.05 U
Dissolved Oxygen
DO
N
m 1L
3.89
0.27
0.3
0.28
-
1 A
Temperature
TEMP
N
Deg C
13.1
18.7
21.3
16
16.8
H
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 Conductivit field
SC
IN
S1cm
632
358
344.2
315.2
-
271.3
Oxidation Reduction Potential
ORP
N
mV
37.3
1 218.2
-52.3
54.9
202.3
GW Depth TOC)
IGW_DEPTH-TOCI
N
I ft
16.06
1 -
8.82
7.15
1
1022
Notes:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
m11= millivolts
NTU - nephelometric turbidity units
pCVL = 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 0 = 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
8G-5S
GWA-12D
GWA-12D
GWA-12D
GWA-12D
GWA-12S
GWA-125
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
1111612015
1211512015
6/412015
9/912015
11f1W2015
12/1512015
6/4/2015
9/11/2015
N
N
N
N
N
N
N
N
DR-BG-5S-NS-4015-1
DR-BG-5S-NS-4015-2
GWA-12D
DR-GWA-I2D-NS-3015
DR-GWA-12D-NS-4015
R-GWA-I2D-NS-4Q15-
GWA-12S
DR-GWA-I2S-NS-3015
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
IL
140
92 J
298
100 U
100 U
100 U
21
100 U
Aluminum
7429-90-5
T
pWL
130
100 U
5 U
81 J
100
511
190
350
Antimony
7440-36-0
D
PqfL
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
P91L
0.5 U
0,5 U
1 U
0.191
0.18 J
0.6 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
pWL
0.5 U
0.5 U
3.71
2.7
2.2
2.2
1 U
0.16 J
Barium
7440-39-3
D
11
10
23
16
22
19
53
46
Barium
7440-39-3
T
700
02L
P91L
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
O,2 U
1 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
PWIL
0.2 U
0.2 U
1 U
O,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
IL
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
pWL
0.08 U
0.08 U
1 U
Q08 U
0.08 U
0.08 U
1 U
0.08 U
Calcium
7440-70-2
T
PPJL
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
P91L
1 J+
0.73 J+
2.87
0.43 J+
0.42 J
0.21 J
1.01
1.4
Cobalt
744048 1
D
-
L
0.5 U
0.5 U
1 U
0.31 J
0.16 J
0.6 U
1 U
0.24 J
Cobalt
7440-48-4
T
1
IMAC
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
uaWfL
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
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
021-
PqJL
0.14
0.05 J
1.74
0.081 J
0.13
0.1 U
1 U
0,24
Magnesium
7439-96 4
T
-
P91L
11400
11300
16400
18000
16700
16200
5960
6070
Manganese
7439-96-5
D
uafL
3.2 J
5 U
60
37
36
34
102
31
Manganese
7439-96-5
T
50
02L
p L
1 16
5 U
49
40 J+
37
36
150
45
Mercu
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
02 U
0.2 U
0.05 U
0.2 U
02 U
O.2 U
0.05 U
0.2 U
Methane
74-82-8
N
P91L
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
P91L
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
pgfL
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
ucUL
0.59
0.64
3.37
3.4
0.77
0.33 J
3.09
3.4
Potassium
7440-09-7
T
-
IL
5000 U
5000 U
1000
5000 U
5000 U
5000 U
1690
5000 U
Selenium
7782-49-2
D
pWL
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
PWL
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
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
PQIL
200
200
526
520
580
560
140
140
Thallium
7440-28-0
D
-
L
0.1 U
OA 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
KVIL
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
32
0.3 U
0.7 J
Vanadium
7440-62-2
T
0.3
IMAC
P91L
0.31 J'
0.3 J
6.65
3.7
3.1
2.3
0.3 U
0.93 J
Zinc
7440-66-6
D
-
IL
4.4 J
4.4 J
14
2.9 J
16
8.6 J
6
5.11
Zinc
7440-66-6
T
1000
02L
pc#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
021-
IL
1 151000
187000
250000
257000
265000
261000
110000
105000
Total Organic Carbon
TOC
N
l-
1 25800
550 J
202 J+
1000 U
1000 U
1000 U
697 J+
710 J
Total Suspended Solids
TSS
N
PWL
2500 U
2500 U
16000
7200
2600 U
2500 U
5000 U
3000
Alkalinity, CO3
ALK-0O3
N
PPJL
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-CAB
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
-
uc#L
440
430
-
170
86
83
-
580
Sulfate
14808-79-8
N
250000
02L
pg1L
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
Iron
7439-89-6
T
300
02L
p L
-
-
-
-
Man anese
7439-96-5
D
L
Manganese
7439-96-5
T
50
02L
l-
-
-
-
-
As III
7784-46-5
T
PqJL
As V
10103-60-3
T
L
-
-
-
Chromium VI
18540-29-9
T
0.07
DHHS
P91L
0.36
0.41
0.021 J
Fe II
1345-25-1
T
-
L
-
-
-
-
-
Fe III
1309-37-1
T
L
Mn It
1344-43-0
T
I
IL
-
-
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
8G-5S
GWA-12D
GWA-12D
GWA-12D
GWA-12D
GWA-12S
GWA-125
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
1111612015
1211512015
6/412015
9/912015
11/1912015
12/1512015
6/4/2015
9/11/2015
N
N
N
N
N
N
N
N
DR-BG-5S-NS-4015-1
DR-BG-5S-NS-4015-2
GWA-12D
DR-GWA-I2D-NS-3015
DR-GWA-12D-NS-4015
R-GWA-I2D-NS-4Q15-
GWA-12S
DR-GWA-I2S-NS-3015
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Mn IV
1313-13-9
T
IL
Se IV
10102-18-8
T
pg1L
-
-
Se(VI)
13410-01-0
T
pgfL
Uranium, Natural
7440-61-1
T
PCOL
-
-
-
-
Radium-226
13982-63-3
T
Ci1L
Radium-228
15262-20-1
T
-
Ci1L
-
-
-
-
Uranium-233
13968-55-3
T
L
Uranium-234
13966-29-5
T
l
-
-
-
Uranium-236
13982-70-2
T
PWIL
Dissolved Oxygen
DO
N
m 1L
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
H
PH
N
6.5
1 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
2.38
87.1
Specific Conductivity field
SC
N
Slcm
256.4
396.7
526
385.3
371.E
151.3
257.4
Oxidation Reduction Potential
ORP
N
mV
1 158.3
-81.4
-19.7
-69.7
-79A
321
242.7
GW Depth TOC)
IGW_DEPTH-TOCI
N
I
I
I ft
1 7.2
-
34.69
-
1 19.1
-
16.76
Notes:
pg/L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
m11= millivolts
NTU - nephelometric turbidity units
pCVL = 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 0 = 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-129
GWA-9D
GWA-9D
GWA-9D
OoWA-913
GWA-9S
GWA-9S
GWA-95
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
Round 3
1211812015
6115/2015
9/912015
11116/2015
12/1512016
6/19/2015
9/912015
11116/2015
N
N
N
N
N
N
GWA-9S
N
N
5R-GWA-12S-NS-40154
GWA-9D
DR-GWA-9D-NS-3Q15
DR-GWA-9D-NS-4Q15.1
DR-GWA-91D-NS-4015-2
DR-GWA-9S-NS-3015
DR-GWA-9S-NS-4015-1
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
IL
100 U
10 U
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
l
560
1270
100 U
210
100 U
4300
630
300
Antimony
7440-36-0
D
uafL
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
P91L
0.19 J
0.5 U
0.5 U
0.5 U
0.5 U
0.22 J
0.5 U
0.6 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
pWL
0.48 J
2.3
0.67
0.84
0,84
0.63
0.5 U
0.5 U
Barium
7440-39-3
D
34
24
20
14
12
5 U
10
11
Barium
7440-39-3
T
700
02L
P91L
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
PWIL
0.0811
0.086 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
IL
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
pWL
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
7210
17700
14200
8270
7150
1050
584
835 J+
Chromium
7440-47-3
D
L
0.65 J+
025 J
0.34 J
0.5 U
0.5 U
027 J+
0.57
0,49 J+
Chromium
7440-47-3
T
10
02L
P91L
3.4
2.9
1.2 J+
2.5 J+
1.4 J+
3.5
0.97 J+
0.82 J+
Cobalt
744048 1
D
-
1OWL
0-26 J
0.51
0.36 J
0.76
0.81
1.5
4.6
6.5
Cobalt
7440-48-4
T
1
IMAC
P91
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
pgfL
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
PCYL
a90
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
021-
PPJL
0.35
0.67 J+
0.1 U
0,32
0.14
4.3
0.38
0.39
Magnesium
7439-954
T
-
PWIL
4370
3050
2620
2260
2030
890
558
753
Manganese
7439-96-5
D
PqfL
27
590
690
660
480
36
100
140
Manganese
7439-96-5
T
50
02L
u L
37
640
720
620
530
220
110
140
Mercu
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
02 U
0.072 J
0.2 J
0.2 U
02 U
0.073 J+
02 U
0.2 U
Methane
74-82-8
N
P91L
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
P91L
0.5 U
0.27 J
0.12 J
0.21 J
0.5'U
0.6 U
0.5 U
0.6 U
Molybdenum
7439-98-7
T
pgfL
0.11
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
-
IL
5000 U
5000 U
6000 U
5000 U
6000 U
5000 U
5000 U
5000 U
Selenium
7782-49-2
D
pWL
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
PWL
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
5630
6140
5510
5000
4850 J
6980
5390
5960
Strontium
7440-24-6
D
l
94
63
52
33
25
3A J
8.1
9.5
Strontium
7440-24-6
T
uolL
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
KVIL
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
P91L
2.4 J+
1.8
1 U
0.38 J
0.39 J
61
0.59 J
0.65 J
Zinc
7440-66-6
D
-
IL
16
3.9 J+
10 U
8.7 J
3.1 J
5.1 J+
12
13
Zinc
7440-66-6
T
1000
02L
pc#L
6.9 J
8.9 J+
10 U
12 J+
16
20
16
11 J+
Total Dissolved Solids
TDS
N
500000
021-
IL
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
PWL
2500 U
16100
5000 U
5800
5900
239000
30200
6900
Alkalinity, CO3
ALK-0O3
N
PPJL
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-CAB
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
ucUL
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
PCSL
790
20 U
20 U
20 U
20 U
48
36
31
Sulfate
14808-79-8
N
250000
02L
pg1L
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
021-
Iron
7439-89-6
T
300
02L
h L
-
-
-
Manganese
7439-96-5
D
L
Manganese
7439-96-5
T
50
02L
L
-
-
-
-
As III
7784-46-5
T
As V
10103-60-3
T
L
-
-
-
-
-
Chromium VI
18540-29-9
T
0.07
DHHS
P91L
0.26
0.03 U
0.03 U
0.083
WOO
1345-25-1
T
-
L
-
-
-
-
-
Fe III
1309-37-1
T
L
Mn It
1344-43-0
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-129
GWA-9D
GWA-9D
GWA-9D
41WA-913
GWA-9S
GWA-9S
GWA-9S
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
Round 3
1211812015
6115/2015
9/912015
11116/2015
12/1512016
6/19/2015
9/912015
11116/2015
N
N
N
N
N
N
GWA-9S
N
N
5R-GWA-12S-NS-40154
GWA-9D
DR-GWA-9D-NS-3Q15
DR-GWA-9D-NS-4Q15.1
DR-GWA-91D-NS-4015-2
DR-GWA-9S-NS-3015
DR-GWA-9S-NS-4015-1
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Mn IV
1313-13-9
T
IL
Se IV
10102-18-8
T
PCIVIL
-
-
Se(VI)
13410-01-0
T
uafL
Uranium, Natural
7440-61-1
T
PCOL
-
-
-
-
Radium-226
13982-63-3
T
CUL
Radium-228
15262-20-1
T
-
Ci1L
-
-
-
-
Uranium-233
13968-55-3
T
pglL
Uranium-234
13966-29-5
T
l
-
-
Uranium-236
13982-70-2
T
Dissolved Oxygen
DO
N
m 1L
-
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
H
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
7.2
9.24
Specific Conductivity field
Sc
N
ps1crn
-
141.9
157.4
89.6
84.4
39.3
48.1
45.2
Oxidation Reduction Potential
ORP
N
mV
90.8
69.8
1.5
42
331.5
287
241.6
GW Depth TOC
GW DEPTH -TO
N
ft
-
-
34.66
28.1
34.68
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
m11= millivolts
NTU - nephelometric turbidity units
pCUL = 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 surfaee 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 0 = 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
1211512015
61112015
911012015
1211512015
613012015
1211512015
N
N
N
N
N
N
DR-GWA-9S-NS4015-2
MW-23BR
DR-MW-23BR-NS-3015
R-MW-23BR-NS-4Q15-
MW-23D
DR-MW-23D-NS-4Q75-2
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
IL
85 J
75
100 U
100 U
100 U
88 J
Aluminum
7429-90-5
T
PWL
300
8
100 U
66 J
180
100 U
Antimony
7440-36-0
D
uafL
0.5 U
1.16
0.50 U
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
P91L
0.5 U
1.21
0.50 U
0.5 U
0.5 a
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
pWL
0.5 U
6.36
1.1
0.65
0.27 J
0.33 J
Barium
7440-39-3
D
11
132
120
110
94
72
Barium
7440-39-3
T
700
02L
P91L
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
PWL
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
IL
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
pWL
0.037 J
1 U
0.080 U
Q08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
1130
53700
48500
54500
61100
59000
Chromium
7440-47-3
D
L
0.23 J+
1 U
0.25 J
021 J
0.22 J
0.34 J
Chromium
7440-47-3
T
10
02L
uoWJL
0.58 J+
1 U
0.50 U
0.5 U
0.26 J+
1.5
Cobalt
7440-48 1
D
-
PWL
6.7
1 U
0.50 U
0.5 U
0.22 J
0.181
Cobalt
7440-48-4
T
1
IMAC
P91L
6.6
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
PqL
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
KYL
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
021-
PPJL
0.25
1 U
0.10 U
0.1 U
0.057 J+
0.24
Magnesium
7439-96 4
T
L
896
18900
18900
19400
13600
13000
Manganese
7439-96-5
D
pgfL
140
31
30
27
300
110
Manganese
7439-96-5
T
50
02L
P91L
ISO
32
29
30
280
25
Mercu
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
IJWL
02 U
0.05 U
0.20 UJ
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
P91L
1.9 J+
10 UJ
55.7
45.5
1.8 J+
55.5
Molybdenum
7439-98-7
D
P91L
0.5 U
2.51
1.6
1 A
0.57
0.48 J
Molybdenum
7439-98-7
T
pgfL
0.5 U
2.52
1.6
1.1
0.41 J
0.12 J
Nickel
7440-02-0
D
-
PWL
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
-
IL
6000 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
ucVL
0.5 U
1 U
0.50 U
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
6460
13200
15200
14000
7300
6400
Strontium
7440-24-6
D
IJQjL
13
1930
2100
1700
890
480
Strontium
7440-24-6
T
PQIL
15
1940
1900
1900
740
110
Thallium
7440-28-0
D
-
PWL
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
KYL
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
L
0.74 J'
1.38
1.0 U
0.31 J
1 U
12
Zinc
7440-66-6
D
-
IL
10
14
IOU
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
021-
IL
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
ijcOL
5900
5000 U
2500 U
2600 U
2500 U
3500
Alkalinity, CO3
ALK-0O3
N
PPJL
5000 U
10000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
IJWL
7800
220000
203000
233000
205000
168000
Alkalinity, lab
ALK-CAB
N
L
7800
220000
203000 J-
233000 J
205000
168000
Chloride
16887-00-6
N
250000
02L
PWL
4200
3300
3800
4100
8000 J+
5200
Nitrite as N
14797-65-0
N
1000
02L
ucUL
10 U
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
pcSL
42 J+
-
20 U
20 U
20 UJ
36
Sulfate
14808-79-8
N
250000
02L
pg1L
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
0.58
0.5 U
Iron
7439-89-6
T
300
02L
p L
-
-
516
-
100
Manganese
7439-96-5
D
L
31.4
193
Manganese
7439-96-5
T
50
02L
L
-
-
322 J+
-
272 J+
As III
7784-46-5
T
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
P91L
0.027 J
0.014 J
0489 J
1.1
Fe II
1345-25-1
T
-
IL
-
476 J
20 U
46.6 J-
Fe III
1309-37-1
T
L
20 U
Mn It
1344-43-0
T
I
IJWL
-
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
1211512015
61112015
911012015
1211512015
613012015
1211512015
N
N
N
N
N
N
DR-GWA-9S-NS4015-2
MW-23BR
DR-MW-23BR-NS-3015
R-MW-23BR-NS-4Q15-
MW-23D
DR-MW-23D-NS-4Q75-2
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Mn IV
1313-13-9
T
IL
311 J
Se IV
10102-18-8
T
PCYL
-
-
2 UJ
0.5 U
2 U
Se(VI)
13410-01-0
T
uafL
2 UJ
0.5 UJ
2 U
Uranium, Natural
7440-61-1
T
PCOL
-
-
-
Radium-226
13982-63-3
T
91L
Radium-228
15262-20-1
T
-
Ci1L
-
-
Uranium-233
13968-55-3
T
pg1L
Uranium-234
13966-29-5
T
PCYL
-
-
Uranium-236
13982-70-2
T
Dissolved Oxygen
DO
N
m 1L
1.6
305
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
H
PH
N
6.5
8.5
02L
SU
5.3
7A5
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
N
pslcm
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)
IGW_DEPTH-TOCI
N
I
ft
28A9
-
-
-
-
15.48
Notes:
pg/L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCVL = 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 surfaee 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 0 = 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 Name11D:
GWA-12D
GWA-12D
GWA-12S
GWA-12S
GWA-6S
GWA-70
GWA-7D
Round i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 2 30-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
6/4/2015
91912015
6/412015
9111/2015
9/1212015
6/16/2015
911012015
N
N
N
N
N
N
N
GWA-12D
DR-GWA-12D-NS-3015
GWA-12S
DR-GWA-I2S-NS-3015
DR-GWA-6S-NS-3015
GWA-71D
DR-GWA-7D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Onit
Aluminum
D
7429-90-5
NS
p IL
298
100 U
21
100 U
100 U
9.1 J
100 U
Aluminum
T
7429-90-5
AS
1L
5 U
81 J
190
350
220
117
130
Antimony
D
7440-36-0
NS
p IL
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
p 1L
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
p IL
2.54
2.3
1 U
0.14 J
3A
0.5 U
0.5 U
Arsenic
T
7440-38-2
--
10
02L
p 1L
3.71
2.7
1 U
0,16 J
2.9
0.13 J
0.5 lJ
Barium
D
7440-39-3
NS
1L
23
16
53
46
210
23
19
Barium
T
7440-39-3
700
02L
1L
17
16
55
54
220
24
19
Beryllium
D
744041-7
NS
p 1L
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
p 1L
1 U
0.2 U
1 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
D
744042-8
NS
p 1L
50 U
50 U
50 U
50 U
710
50 U
50 U
Boron
T
7440-42-8
700
02L
p 1L
50 U
50 U
50 U
50 U
700
50 UJ
50 U
Cadmium
D
744043-9
NS
p IL
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
p 1L
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
1L
51700
54700
12200
10100
83000
26900
22800
Chromium
D
7440-47-3
--
NS
p 1L
1 U
0.23 J
1 U
0,48 J
0,45 J
0.25 J+
1.3
Chromium
T
744047-3
10
02L
p IL
2.87
0.43 J+
1.01
1.4
0,75 J+
0.51 J+
0.54 J+
Cobalt
D
7440-48-4
-
NS
1L
1 U
0.31 J
1 U
0,24 J
1.6
2.8
2.7
Cobalt
T
7440484
1
IMAC
p 1L
1 U
0.35 J
1 U
0,49 J
1.8
2.8
2.8
Copper
D
7440-50-8
NS
1L
3,32
1 U
1 UJ
0,57 J
0.29 J
0,22 J+
1 U
Copper
T
7440-50-8
1000
02L
p IL
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
p 1L
386
30 J
IOU
50 U
13600
1390
1700
Iron
T
7439-89-6
300
02L
p IL
54
100
185
460
15200
1610
1800
Lead
D
7439-92-1
NS
p 1L
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
p IL
1,74
0.081 J
1 U
0,24
0.077 J
0.13 J+
0.11
Magnesium
T
7439-95-4
NS
p 1L
1 16400
18000
5960
6070
12500
13300
12900
Manganese
D
7439-96-5
NS
p IL
60
37
102
31
3700
1100
960
Manganese
T
7439-96-5
50
02L
p IL
49
40 J+
150
45
3800
1000
910
Mercury
D
7439-97-6
NS
p 1L
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
p 1L
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
p IL
10 U
1.8 J+
10 U
1.8 J+
2740
IOU
1.8 J
Molybdenum
D
7439-98-7
--
NS
I p 1L
1.26
0,82
1 U
0.5 U
8.6
0.14 J
0.5 U
Molybdenum
T
7439-98-7
NS
p IL
1,52
0.8
1 U
0.11 J
8
0.111
0.5 U
Nickel
D
7440-02 0
-
NS
1L
1 U
3
2,14
2.9
1.8
1.4 J+
1.7
Nickel
T
7440-02-0
100
02L
1L
3.37
3A
3.09
3.4
1.9
2.1 J+
1.3 J+
Potassium
T
7440-09-7
NS
p IL
1000
5000 U
1690
5000 U
10700
5000 U
5000 U
Selenium
D
7782-49-2
NS
p IL
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
p 1L
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
p 1L
9470
9730
7920
7010
26200
25900
22900
Strontium
D
7440-24-6
NS
p 1L
533
520
140
140
680
290
290
Strontium
T
7440-24-6
NS
p IL
526
520
140
140
710
290
280
Thallium
D
7440-28-0
NS
p 1L
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
p 1L
0.2 U
0.1 U
0.2 U
0.1 U
0,1 UJ
0,1 UJ
0A U
Vanadium
D
7440-62-2
NS
p 1L
2.75
3
03 U
0.7 J
1.2
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
p IL
5.65
3.7
0.3 U
0.93 J
1.1
0.3 J
1 U
Zinc
D
7440-66-6
NS
p 1L
1 14
2.9 J
6
5.1 J
13
2.6 J
12
Zinc
T
7440-66-6
1000
02L
p IL
5 UJ
12
5 UJ
5.9 J
4.8 J
3.5 J
10 J+
Total Dissolved Solid
N
TDS
500000
02L
p 1L
250000
257000
110000
105000
340000
242000
233000
Total Organic Carbor
N
TOC
NS
p IL
202 J+
1000 U
697 J+
710 J
7800
590 J
1000 U
Total Suspended Sol
N
TSS
-
NS
1L
16000
7200
5000 U
3000
371000
4300
5000 U
Alkalinity, CO3
N
ALK-0O3
--
NS
p IL
10000 U
5000 U
10000 U
5000 U
5000 UJ
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
-
NS
p IL
190000
196000
28000
11900
317000
59000
53900
Alkalinity, lab
N
ALK-LAB
--
NS
p IL
190000
196000
28000
11900
317000
59000
53900
Chloride
N
16887-00-6
-
250000
02L
I p 1L
3900
3300
3000
1700
18900
3000
3000
Nitrite as N
N
14797-65-0
1000
02L
p 1L
178
808
Nitrogen, NO2 plus lN
N
NO2-NO3
NS
p 1L
170
580
16 J-
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
16000
15300
41000
46100
2300
98200
98600
Sulfide
N
18496-25-8
-
NS
p 1L
500 U
100 L!
100 U
100 U
100 U
100 U
100 lJ
As Ill
T
778446-5
NS
p 1L
As V
T
10103-60-3
NS
p 1L
Chromium (VI)
T
18540-29-9
0.07
DHHS
p IL
Fe(II)
T
1345-25-1
NS
p 1L
Fe(III)
T
1309-37-1
NS
p IL
Mn(II)
T
1344-43-0
NS
p 1L
Mn(IV)
T
1313-13-9
NS
p 1L
Se lV
T
10102-18-8
NS
I
L
Se(VI)
T
13410-41-0
NS
p IL
Uranium, Natural
I T
7440-61-1
NS
p 1L
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-70
GWA-71)
Round i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 2 30-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
6/4/2015
91912015
6/412015
9111/2015
9/1212015
6/16/2015
911012015
N
N
N
N
N
N
N
GWA-12D
DR-GWA-I2D.NS-3015
GWA-12S
DR-GWA-I2S-NS-3015
DR-GWA-6S-NS-3015
GWA-71)
DR-GWA-7D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium 228
T
15262-20-1
NS
pCiIL
Uranium-233
T
13968-55-3
NS
p IL
Uranium-234
T
13966-29-5
NS
p 1L
Uranium-236
T
13982-70-2
NS
p IL
Dissolved Oxygen
N
1 DO
NS
I
m 1L
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
1 7.4 11
6.45
5.6
1 6.8
1 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
pS1cm
396.7
526
151.3
257.4
687
353.2
252.1
Oxidation Reduction
N
GRP
NS
mV
-81 A
-19.7
321
242.7
-92.1
129
-74.6
GW Depth TOC
N
GW,_DEPTH-TOq
NS
ft
33,28
16,76
19.7
20.5
Notes:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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 NamellD:
GWA-7S
GWA-7S
GWA-8D
GWA-8D
GWA-8S
GWA-91)
GWA-91)
Round i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
6/19/2015
9/10/2015
61512015
91912015
6/1812015
611512015
919/2015
N
N
N
N
N
N
N
GWA-7S
DR-GWA-7S-NS-3015
GWA-81)
DR-GWA-8D-NS-3Q15
GWA-8S N WG 20150619
GWA-91)
DR-GWA-9D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Aluminum
D
7429-90-5
NS
µgrL
420
730
6A J
100 U
100 U
10 U
100 U
Aluminum
T
7429-90-5
NS
p IL
600
850
769
300
150
1270
100 U
Antimony
D
7440-36-0
NS
p IL
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
p IL
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
p IL
0.5 U
0.5 U
1.2
0.98
0.6
2.1
0,69
Arsenic
T
7440-38-2
-
10
02L
p IL
0.5 U
0.5 U
1A
0.86
0,57
2.3
0,67
Barium
D
7440-39-3
--
NS
p IL
25
32
29
32
19
24
20
Barium
T
7440-39-3
700
02L
p IL
28
33
34
34
19
23
21
Be lium
D
744041-7
NS
p IL
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
p IL
3,7
7.7
0.2 U
0.2 U
0,2 U
0,085 J
0.2 U
Boron
D
744042-8
NS
p IL
38 J+
50 U
50 U
50 U
39 J+
50 U
50 U
Boron
T
7440-42-8
700
02L
p IL
50 U
50 U
50 U
50 U
34 J
50 U
50 U
Cadmium
D
744043-9
NS
p IL
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
p 1L
1 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
p IL
25800
23500
130000
124000
39600
17700
14200
Chromium
D
7440-47-3
NS
p IL
0.95 J+
0.87
0.9 J+
1.1
0,46 J
0.25 J
0,34 J
Chromium
T
744047-3
10
02L
p IL
1.9
2 J+
3.2
3.4 J+
0.95
2.9
1.2 J+
Cobalt
D
7440-48-4
--
NS
1L
19.2
13A
0,14 J
0.5 U
8.6
0.51
0,36 J
Cobalt
T
7440484
1
IMAC
p 1L
17.7
14.6
0,26 J
0.19 J
9.7
1.2
0.38 J
Copper
D
7440-50-8
NS
p 1L
1 UJ
2A
5 J+
0,32 J
0.37 J
1 U
1,9
Copper
T
7440-50-8
1000
02L
p IL
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
p IL
50 U
50 U
50 U
140
50 U
1390
1800
Iron
T
7439-89-6
300
02L
p IL
310
61
413
420
190
3290
2000
Lead
D
7439-92-1
NS
p IL
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
p IL
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
IL
18600
18000
29200
34200
24800
3050
2620
Manganese
D
7439-96-5
NS
p IL
1000
1100
1000
1600
2700
590
690
Manganese
T
7439-96-5
50
02L
p IL
950
1200
1200
1700
1700
640
720
Mercury
D
7439-97-6
NS
p IL
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
p IL
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
p IL
1:9 J+
2A J
28
8.8 J+
6.6 J+
10 U
3 J+
Molybdenum
D
7439-98-7
--
NS
p IL
0.5 U
0.2 J
3,1
2A
0,73
0.27 J
0,12 J
Molybdenum
T
7439-98-7
NS
p IL
0,14 J
0,16 J
3A
2.3
0,73
0,52
0.12 J
Nickel
D
7440-02-0
-
NS
IL
51.1
39,6
0.51 J+
0,81
6.1
1.2 J+
0,98
Nickel
T
7440-02-0
100
02L
1L
46.9
42
1.4 J+
1.8 J+
5A
3.2 J+
1.2
Potassium
T
7440-09-7
NS
p 1L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
7782-49-2
NS
p IL
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
p IL
0.86
0,88
11
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
p IL
18700
21400
29900
32900
40400
6140
5510
Strontium
D
7440-24-6
NS
p IL
780
710
630
730
460
63
52
Strontium
T
7440-24-6
NS
p IL
800
740
700
760
420
64
55
Thallium
D
7440-28-0
NS
p IL
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
p IL
0.1 U
0.1 U
0.018 J
0.1 U
CA U
0.1 U
0.1 U
Vanadium
❑
7440-62-2
NS
p IL
1 U
0.4 J
3.2
0.41 J
1 UJ
1 U
1 U
Vanadium
T
7440-62-2
0,3
IMAC
p IL
0.38 J
1 U
5.2
1.3
0.45 J
1.8
1 U
Zinc
D
7440-66-6
NS
p IL
560
490
10 U
10 U
7.8 J
3,9 J+
101.1
Zinc
T
7440-66-6
1000
02L
p IL
390
500
3.4 J+
10 UJ
13
8.9 J+
IOU
Total Dissolved So[id
N
TDS
500000
02L
p IL
318000
287000
690000 J-
726000
397000
113000
91000
Total Organic Carbor
N
TOC
NS
p IL
980 J
750 J
1100
970 J
1200
1000 U
17500
Total Suspended Sol
N
TSS
-
NS
p IL
38000
3000
13000 J+
6700
18900
16100
5000 U
Alkalinity, CO3
N
ALK-0O3
--
NS
p IL
5000 U
5000 U
10000 U
5000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
--
NS
p IL
1 5500
2100 J
120000
129000
61800
57000
47600
Alkalinity, lab
N
ALK-LAB
--
NS
p IL
5500
2100 J
120000
129000
61800
57000
47600
Chloride
N
16587-00-6
-
250000
1 02L
p IL
2400
3000
4700
4000
5500
2000
2100
Nitrite as N
N
14797-65-0
--
1000
02L
p IL
Nitrogen, NO2 plus IN
N
NO2-NO3
NS
p IL
370
1100
20 U
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
176000
170000
368000
346000
181000
4200
4300
Sulfide
N
18496-25-8
NS
p IL
100 U
100 U
500 U
100 U
100 U
500 U
100 U
As(III)
T
778446-5
NS
p IL
As V
T
10103-60-3
NS
p IL
Chromium VI
T
18540-29-9
0.07
DHHS
p IL
Fe II
T
1345-25-1
NS
p IL
Fe(III)
T
1309-37-1
NS
p IL
Mn(II)
T
1344-43-0
NS
p IL
Mn(IV)
T
1313-13-9
NS
p IL
Se IV
T
10102-18-8
NS
I p IL
Se(VI)
T
13410-01-0
NS
p IL
Uranium, Natural
I T
1 7440-61-1
1
NS
p IL
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-913
GWA-91)
Round i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
6/19/2015
9/10/2015
61512015
91912015
6/1812015
611512015
919/2015
N
N
N
N
N
N
N
GWA-7S
DR-GWA-7S-NS-3015
GWA-80
DR-GWA-8D-NS-3Q15
GWA-8S N WG 20150619
GWA-90
1)R-GWA-9D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium 228
T
15262-20-1
NS
pCi1L
Uranium-233
T
13968-55-3
NS
p 1L
Uranium-234
T
13966-29-5
NS
p 1L
Uranium-236
T
13982-70-2
NS
p 1L
Dissolved Oxygen
N
I DO
NS
I
m 1L
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
H field
N
PH
6.5
8.5
02L
SU
5.39
4.9
7.81 I
7.35
6A
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
pS1cm
394.9
419.6
839
950
141.9
157A
Oxidation Reduction
N
GRP
NS
mV
342.9
24.9
78.9
-75
90.8
69.8
GW Depth TOC
N
GW,-DEPTH-TOq
NS
ft
19.21
34.68
Notes:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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 NamellD:
GWA-9S
GWA-9S
MW-12
MW-12
MW-12D
MW-121)
MW-20D
Round i (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
919/2015
6/2012015
91912015
6/2012015
91912015
6/24/2015
N
N
N
N
N
N
N
GWA-9S
DR-GWA-9S-NS-3015
MW-12
DR-MW-12-NS-3Q15
MW-12D
DR-MW-12D•NS-3Q15
MW-20D
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Aluminum
D
7429-90-5
NS
µgrL
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
p IL
4300
630
990
180
960
59 J
130
Antimony
D
7440-36-0
NS
p IL
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
p IL
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
p IL
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
p IL
0.63
0.5 U
0.71
0.28 J
0.44 J
0.24 J
0,91
Barium
D
7440-39-3
--
NS
p IL
5 U
10
5.8
5A
20
19
56
Barium
T
7440-39-3
700
02L
p IL
1 42
17
10
6,7
29
21
66
Beryllium
D
744041-7
NS
p IL
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
p IL
0.67
0,23
0,22
0,14 J
0.11 J
0.2 U
0.2 U
Boron
D
744042-8
NS
p IL
50 U
50 U
33 J+
50 U
50 U
50 U
26 J
Boron
T
7440-42-8
700
02L
p IL
50 U
50 U
50 U
50 U
50 U
50 U
35 J
Cadmium
D
744043-9
NS
p IL
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
p 1L
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
p IL
1050
584
2440
3200
12800
12700
43400
Chromium
D
7440-47-3
NS
p IL
0.27 J+
0,57
0,41 J+
0,18 J
0.2 J+
0.48 J
0.5 UJ
Chromium
T
744047-3
10
02L
p IL
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
1L
1.5
4.5
9.9
9,3
4,5
4.3
0.5 U
Cobalt
T
7440484
1
IMAC
p 1L
9.3
4.7
10+1
8.9
4.8
4.6
0.5 U
Copper
D
7440-50-8
NS
p 1L
1 UJ
5
3.1 J+
2.9
0.25 J+
0,53 J
1 U
Copper
T
7440-50-8
1000
02L
p IL
4.5 J+
1.4
10.6
3.2
1.7 J+
0.38 J
1 U
Iron
D
7439-89-6
NS
p IL
50 U
50 U
1900
2400
4800
4500
50 U
Iron
T
7439-89-6
300
02L
p IL
5100
750
3600
2900
6100
4900
200
Lead
D
7439-92-1
NS
p IL
0.1 U
0.51
0,11 J+
0.19
01 U
0.1 U
0.1 U
Lead
T
7439-92-1
15
02L
p IL
4.3
0,38
4.5
1.4
0.51
0.087 J
0,094 J
Magnesium
T
7439-95-4
NS
IL
890
558
4680
5090
8110
7860
11000
Manganese
D
7439-96-5
NS
p IL
36
100
440
450
1300
1300
470
Manganese
T
7439-96-5
50
02L
p IL
220
110
450
470
1400
1400
Soo
Mercury
D
7439-97-6
NS
p IL
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
p IL
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
p IL
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
p IL
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
p IL
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
IL
0.66 J+
2.9
93
9A
5
4.8
0,5 U
Nickel
T
7440-02-0
100
02L
1L
6.1 J+
2.9
11.2
9.8
5.7
5.2
0.19 J
Potassium
T
7440-09-7
NS
p 1L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U 1
5000 U
Selenium
D
7782-49-2
NS
p IL
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U 1
0.5 U
Selenium
T
7782-49-2
20
02L
p IL
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
p IL
6980
5390
4970 J
5490
13100
11200
10600
Strontium
D
7440-24-6
NS
p IL
3.1 J
8.1
9.2
11
46
51
460
Strontium
T
7440-24-6
NS
p IL
21
9.1
10
12
51
53
520
Thallium
D
7440-28-0
NS
p IL
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
p IL
0.034 J
CA U
0.017 J
0,019 J
0.1 U
0.1 U
0.1 U
Vanadium
❑
7440-62-2
NS
p IL
1 U
1 U
1 U
1 U
1 U
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
p IL
5.1
0.59 J
2.6
1 U
1.4
1 U
0.41 J
Zinc
D
7440-66-6
NS
p IL
5.1 J+
12
90
84
12 J+
17
10 UJ
Zinc
T
7440-66-6
1000
02L
p IL
20
16
92
86
16
18
10 UJ
Total Dissolved So[id
N
TDS
500000
02L
p IL
161000
50000
72000
69000
168000
145000
187000
Total Organic Carbor
N
TOC
NS
p IL
14200
1000 U
1000 U
1000 U
1000 U
1000 U
1000 U
Total Suspended Sol
N
TSS
-
NS
p IL
239000
30200
76300
24200
120000
6900
5500
Alkalinity, CO3
N
ALK-0O3
--
NS
p IL
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
--
NS
p IL
9100
5700
17200
22100
62500
54700
158000
Alkalinity, lab
N
ALK-LAB
--
NS
p IL
9100
5700
17200
22100
62500
54700
158000
Chloride
N
16587-00-6
-
250000
02L
p IL
4200
4000
5900
6000
9400
8900 1
4200
Nitrite as N
N
14797-65-0
--
1000
02L
p IL
Nitrogen, NO2 plus
N
NO2-NO3
NS
p IL
48
36
20 U
20 U
20 UJ
20 U
12 J
Sulfate
N
14808-79-8
250000
02L
p IL
650 J
2700
10200
9900
25400
23200
5700
Sulfide
N
18496-25-8
NS
p IL
100 U
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
778446-5
NS
p IL
As V
T
10103-60-3
NS
p IL
Chromium VI
T
18540-29-9
0.07
DHHS
p IL
Fe II
T
1345-25-1
NS
p IL
Fe(III)
T
1309-37-1
NS
p IL
Mn(II)
T
1344-43-0
NS
p IL
Mn(IV)
T
1313-13-9
NS
p IL
Se IV
T
10102-18-8
NS
p IL
Se(VI)
T
13410-01-0
NS
p IL
Uranium, Natural
T
7440-61-1
NS
p IL
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-121)
MW-20D
Round i (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
919/2015
6/2012015
91912015
6/2012015
91912015
6/24/2015
N
N
N
N
N
N
N
GWA-9S
DR-GWA-9S-NS-3015
MW-12
DR-MW-I2-NS-3Q15
MW-12❑
DR-MW-12D•NS-3Q15
MW-20D
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium 228
T
15262-20-1
NS
pCi1L
Uranium-233
T
13968-55-3
NS
p 1L
Uranium-234
T
13966-29-5
NS
p 1L
Uranium-236
T
13982-70-2
NS
p 1L
Dissolved Oxygen
N
I DO
NS
I
m 1L
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
H field
N
PH
6.5
8.5
02L
SU
1 6.55
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
9A7
Spec. Cond. field
N
SC
NS
pS1cm
39.3
48.1
58.3
101.7
1 210.5
214.5
322
Oxidation Reduction
N
GRP
NS
mV
331.5
287
166.3
-48.2
64.5
-54.4
22
GW Depth TOC
N
GW,-DEPTH-TOq
NS
ft
32,68
23.35
22.64
Notes:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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 T16A 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 NamellD:
MW-20S
OW-31OD
Round 1 (CSA Sampling)
Round 2 3Q-2015
612412015
9111/2015
N
N
MW-20S
DR-OW-31D'D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Aluminum
D
7429-90-5
NS
µgrL
100 U
100 U
Aluminum
T
7429-90-5
NS
p IL
100 U
800
Antimony
D
7440-36-0
NS
p IL
0.5 U
0.28 J
Antimony
T
7440-36-0
-
1
IMAC
p IL
0.5 U
0,25 J
Arsenic
D
7440-38-2
--
NS
p IL
0.58
777
Arsenic
T
7440-38-2
-
10
02L
p IL
0.63
782
Barium
D
7440-39-3
--
NS
p IL
12
380
Barium
T
7440-39-3
700
02L
p IL
13
410
Be lium
D
744041-7
NS
p IL
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
0.2 U
0.12 J
Boron
D
744042-8
NS
p IL
50 U
980
Boron
T
7440-42-8
700
02L
I p IL
50 U
980
Cadmium
D
744043-9
NS
p IL
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
p 1L
0.08 U
0,08 U
Calcium
T
7440-70-2
NS
p IL
15300
95200
Chromium
D
7440-47-3
NS
p IL
0.24 J+
0,21 J
Chromium
T
744047-3
10
02L
p IL
0.22 J
0.95 J+
Cobalt
D
7440-48-4
--
NS
1L
2.2
1.4
Cobalt
T
7440484
1
IMAC
p 1L
2.1
1.9
Copper
D
7440-50-8
NS
p 1L
1 1 U
1 U
Copper
T
7440-50-8
1000
02L
p IL
1 U
1.7 J+
Iron
D
7439-89-6
NS
p IL
2500
2200
Iron
T
7439-89-6
300
02L
p IL
2800
3500
Lead
D
7439-92-1
NS
p IL
0.1 U
0.1 U
Lead
T
7439-92-1
15
02L
p IL
0.1 U
0.71
Magnesium
T
7439-95-4
NS
IL
10500
13500
Manganese
D
7439-96-5
NS
p IL
840
1400
Manganese
T
7439-96-5
50
02L
p IL
820
1600
Mercury
D
7439-97-6
NS
p IL
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
p IL
0.2 U
0.2 U
Methane
N
74-82-8
NS
p IL
79.2
816
Molybdenum
D
7439-98-7
--
NS
p IL
0,22 J
45.9
Molybdenum
T
7439-98-7
NS
p IL
0,18 J
43
Nickel
D
7440-02-0
-
NS
IL
0.92
2.2
Nickel
T
7440-02-0
100
02L
1L
0.87
2.6 J+
Potassium
T
7440-09-7
NS
p 1L
5000 U
7810
Selenium
D
7782-49-2
NS
p IL
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
p IL
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
p IL
9640
20000
Strontium
D
7440-24-6
NS
p IL
120
2600
Strontium
T
7440-24-6
NS
p IL
130
2600
Thallium
D
7440-28-0
NS
p IL
0.1 U
0.091 J
Thallium
T
7440-28-0
0.2
IMAC
p IL
0.1 U
0.14 J+
Vanadium
❑
7440-62-2
NS
p IL
1 U
1.6
Vanadium
T
7440-62-2
0.3
IMAC
p IL
1 U
3.2
Zinc
D
7440-66-6
NS
p IL
2.8 J+
12
Zinc
T
7440-66-6
1000
02L
p IL
60
3.4 J
Total Dissolved Solid
N
TDS
500000
02L
p IL
121000
383000
Total Organic Carbor
N
TOC
NS
p IL
690 J
1000 U
Total Suspended Sol
N
TSS
-
NS
p IL
3000
6600
Alkalinity, CO3
N
ALK-0O3
--
NS
p IL
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
--
NS
p IL
68300
283000
Alkalinity, lab
N
ALK-LAB
--
NS
p IL
68300
283000
Chloride
N
16587-00-6
-
250000
02L
p IL
20800
19100
Nitrite as N
N
14797-65-0
--
1000
02L
p IL
Nitrogen, NO2 plus
N
NO2-NO3
NS
p IL
1 20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
3800
26400
Sulfide
N
18496-25-8
NS
p IL
100 U
100 U
As(III)
T
77a446-5
NS
p IL
As V
T
10103-60-3
NS
p IL
Chromium VI
T
18540-29-9
0.07
DHHS
p IL
Fell
T
1345-25-1
NS
I p IL
Fe(III)
T
1309-37-1
NS
p IL
Mn(II)
T
1344-43-0
NS
p IL
Mn(IV)
T
1313-13-9
NS
p IL
Se IV
T
10102-18-8
1
NS
p IL
Se(VI)
T
13410-01-0
NS
p IL
Uranium, Natural
T
7440-61-1
NS
p IL
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-31OD
Round 1 (CSA Sampling)
Round 2 3Q-2015
612412015
9111/2015
N
N
MW-20S
DR-0W-31D'D-NS-3Q15
Constituent
Fractio
CAS RN
Criteria Min
Groundwate
Criteria
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium 228
T
15262-20-1
NS
pCi1L
Uranium-233
T
13968-55-3
NS
p 1L
Uranium-234
T
13966-29-5
NS
p 1L
Uranium-236
T
13982-70-2
NS
p 1L
Dissolved Oxygen
N
I DO
NS
I
m 1L
0.81
Temp Celcius
N
TEMP
NS
Deg C
23.6
H 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
pSlcm
483.9
Oxidation Reduction
N
GRP
NS
mV
-133.3
GW Depth TOC
N
GW,-DEPTH-TOq
NS
ft
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
It = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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 T16A 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-1pD
AB-25BR
AB-25BR
AB-25D
AB-25D
AS-30BR
Round i (CSA Sampling)
Round 2 3Q-2015
Round i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
612412015
9111/2015
6126/2015
9111/2015
6/26/2015
9/12/2015
6124/2015
N
N
N
N
N
N
N
AS-10D
DR-AB-100-NS-3015
AB-25BR
DR-AB-25BR-NS-3015
AB-25D
DR-AB-25D-NS-3015
AB-308R
Constituent
Fractlon
GAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
1L
74 J
100 U
100 U
100 U
52 J
100 U
100 U
Aluminum
T
7429-90-5
NS
1L
290
430
100 U
85 J
170
360
280
Antimony
❑
7440-36-0
NS
1L
8.8
15
1
0.86
1.6
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
p 1L
1.9
1.4
1
0.45 J
1.7
0.2 J
0.5 U
Arsenic
❑
7440-38-2
NS
1L
0.66
0.41 J
2.4
1.6
0.31 J
0.25 J
0.82
Arsenic
T
7440-38-2
10
02L
p 1L
0.68
0.51 J+
2.6
1
0.45 J
0.38 J
0,83
Barium
D
7440-39-3
NS
1L
37
310
19
30
16
26
82
Barium
T
7440-39-3
700
02L
1L
290
400
21
35
20
29
99
Beryllium
D
744041-7
NS
1L
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
p 1L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
D
744042-8
NS
p 1L
250
240
190
270
820
930
300
Boron
T
7440-42-8
700
02L
p 1L
290
230
180
260
840
830
320
Cadmium
D
744043-9
NS
p 1L
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
1L
0,08 U
0,08 U
0,08 U
0.08 U
O.026 J
0.08 U
0.08 U
Calcium
T
7440-70-2
NS
1L
60800 J-
88700
33200
40500
29300
35600 J-
69700
Chromium
D
7440-47-3
NS
1L
5.5
3A
4A
0.49 J
0.19 J+
0,33 J+
0,86 J+
Chromium
T
744047-3
10
02L
p 1L
4A
6A
30.1
13.4
0.96
2.9 J+
2.2 J+
Cobalt
D
7440-48-4
NS
1L
0.96
1.1
0.5 U
0.5 U
0.25 J
0,34 J+
0.5 U
Cobalt
T
744048-4
1
IMAC
p IL
1.1
1.9
0.27 J
0.24 J
0.3 J
0.78
0.29 J
Copper
D
7440-50-8
NS
1L
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
IL
2A J+
1.9
1.6
2.5 J+
0.36 J
0.77 J+
2.5 J+
Iron
D
7439-89-6
NS
1L
50 U
50 UJ
50 U
50 U
50 U
50 U
77
Iron
T
7439-89-6
300
02L
p 1L
34 J
43 J
150
150
93
330
490
Lead
D
7439-92-1
NS
1L
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
1L
0.13
1.2
0.086 J
OA9
0.17
0.52 J+
0.28
Magnesium
T
7439-95-4
NS
1L
10900
3060
6090
8390
10500
13400
10900
Manganese
D
7439-96-5
NS
IL
5 U
5 U
4.1 J
52
190
510
350
Manganese
T
7439-96-5
50
02L
p 1L
26
13
7.8
59
180
550
370
Mercury
❑
7439-97-6
NS
1L
0.2 U
0.2 U
0.2 U
0.2 J
0.2 U
0.2 UJ
0.2 U
Mercury
T
7439-97-6
1
02L
1L
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
1L
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
1L
2A
2.1
7A
5.5
12.6
11.4
2.3
Molybdenum
T
7439-98-7
NS
p 1L
1.6
2.4
8.3
3.4
13
11.6
2.4
Nickel
D
7440-02-0
NS
1L
1.8 J+
1.7
1.2 J+
1.7
2.3
3 J+
1.4 J+
Nickel
T
7440-02-0
100
02L
1L
1.6 J+
2.3
15A
7.3
2.9
4.8 J+
2.5 J+
Potassium
T
7440-09-7
NS
1L
68800 J-
93800
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
778249-2
NS
p 1L
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
p 1L
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
1L
42000
58200
43700
35500
32300
24300
14200
Strontium
D
7440-24-6
NS
1L
730
3400
380
530
160
160
680
Strontium
T
7440-24-6
NS
1L
2900
3900
410
570
180
170
740
Thallium
D
7440-28-0
NS
1L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
O.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
p IL
0.1 U
0.02 J
0.1 U
OA UJ
O:023 J
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
1L
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
p IL
1.5
0.63 J
5.5
1.7
0.69 J
0.64 J
0+91 J
Zinc
D
7440-66-6
NS
1L
10 UJ
10 U
1O U
10 U
10 U
27 J+
10 UJ
Zinc
T
7440-66.6
1000
02L
p IL
10 UJ
7.2 J
10 U
2.8 J
3.6 J
38
12 J+
Total Dissolved Solids
N
TDS
500000
02L
p 1L
272000
1320000
296000
289000
258000
247000
327000
Total Organic Carbon
N
TOC
NS
1L
28400
1200
1200
960 J
1000 U
10700
1000 U
Total Suspended Solids
N
TSS
-
NS
1L
80400
2500 U
10100
5000
22400
12100
Alkalinity, CO3
Ni
ALK-CO3
NS
p 1L
10000
5000 U
11500
5000 U
5000 U
5000 UJ
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
1L
226000
698000
55900
66600
70800
1000 J+
133000
Alkalinity, lab
N
ALK-I-AB
NS
1L
236000
698000
67400
66600
70800
1000 J+
133000
Chloride
N
16887-00-6
250000
02L
1L
24900
17400
22900
23600
19800
20400
20800
Nitrite as N
N
14797-65-0
-
1000
02L
1L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
1L
13 J+
20 U
20 U
20 U
12 J
20 U
20 UJ
Sulfate
N
14808-79-8
250000
02L
p 1L
33700
19800
99000
99800
83000
84800
96700
Sulfide
N
18496-25-8
NS
1L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
1L
0.439
0.189
As V
T
10103-60-3
NS
1L
0.143
0.325
Chromium VI
T
18540-29-9
0.07
DHHS
p 1L
4.51
0.039 J+
Fe II
T
1345-25-1
NS
1L
20 U
20 U
Fe(Ill)
T
1309-37-1
NS
p 1L
20 UJ
20 U
Mn II
T
134443-0
NS
/L
5 UJ
213
Mn(IV)
T
1313-13-9
NS
1L
13.1
5.76
IV
T
10102-18-8
NS
1L
0.5 U
0.5 U
rSe
Se i
T
13410-01-0
NS
p 1L
0.5 U
0.5 U
Uranium, Natural
T
1 7440-61-1
NS
1L
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-25611
AB-25BR
AB-25D
AB-25D
AS-30BR
Round i (CSA Sampling)
Round 2 3Q-2015
Round i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
612412015
9111/2015
6126/2015
9111/2015
6/26/2015
9/12/2015
6124/2015
N
N
N
N
N
N
N
AS-10D
DR-AB-100-NS-3015
AB-25BR
DR-AB-25BR-NS-3015
AB-25D
DR-AB-25D-NS-3015
AB-308R
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCiIL
1.02
E47
0.499 J
Radium-228
T
15262-20-1
NS
pCi1L
2.03 J
3 U
3 U
Uranium-233
T
13968-55-3
NS
1L
0.05 U
0.05 U
0.05 U
Uranium-234
T
13966-29-5
NS
1L
0.05 U
0.05 U
0,05 U
Uranium-236
T
13982-70-2
NS
!L
0.05 U
0.05 U
0.05 U
❑ ssolved Oxygen
N
00
NS
m II
0,2
0.27
0.67
0.51
0,74
Temp Celsius
N
TEMP
--
NS
Deg C
22.9
23.1
24.4
22.7
23.7
H((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
6.11
16.71
Spec. Cond. field
N
SC
NSPS/Cm
55B8
427
440,7
390
374,2
Oxidation Reduction. Potential
N
CRP
NS
my
-197.8
155
5A
208
127.9
GW Depth TOC
N
IGW DEPTH -TOO
NS
ft
1
1 59.23
52,44
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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 Namel10:
AB-30SR
AS-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
9/1012015
612412015
9111/2015
612912015
9110/2015
612512015
911012015
N
N
N
N
N
N
N
DR-AB-30BR-NS-36115
AB-30D
DR-AB-30D-NS-3015
AB-30S
DR-AB-30S-NS-3Q15
AB-35BR
DR-AB-35BR-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
1L
100 U
100 U
100 U
110
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
1L
270
94 J
250
130 J
3400
190
75 J
Antimony
D
7440-36-0
NS
1L
0.5 U
2
0.43 J
0.5 UJ
0.5 U
0.51
0.5 U
Antimony
T
744036--0
1
IMAC
p 1L
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
1L
0.78
0.46 J
0.35 J
0.5 UJ
0.5 U
12
9.3
Arsenic
T
7440-38-2
10
02L
p IL
0.94
0,41 J
0.41 J+
0.5 U
0.96
11.7
10.5 J
Barium
D
7440-39-3
NS
1L
110
82
91
120
110
210
370
Barium
T
7440-39-3
700
02L
IL
100
110
95
130
160
240
360
Beryllium
D
744041-7
NS
1L
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
p 1L
0,2 U
0,2 U
0.2 U
0,45
0.84
0,2 U
0.2 U
Boron
D
744042-8
NS
p 1L
310
240
290
300
320
270
220
Boron
T
7440-42-8
700
02L
p 1L
300
250
270
290
310
270
240
Cadmium
D
744043-9
NS
p 1L
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
fL
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
1L
70400
52300
57200
8580
5720
84300
79000
Chromium
D
7440-47-3
NS
IL
0,21 J
2 J+
0,75
0,78 J+
0.2 J
1.5 J+
0,55
Chromium
T
744047-3
10
02L
p IL
1.7
2.7
3.3
0.99 J+
10.4
3.8
2.3 J
Cobalt
D
7440-48-4
NS
IL
0.5 U
0,18 J
0,27 J
0.5 UJ
24.9
0,24 J
0.5 U
Cobalt
T
744048-4
1
IMAC
p IL
0.23 J
0.3 J
0.44 J
29
30.7
0.26 J
0.14 J
Copper
D
7440-50-8
NS
IL
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
IL
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
1L
94
50 U
50 J
39 J
33 J
50 U
50 U
Iron
T
7439-89-6
300
02L
p 1L
460
97
380
1101
4200
150
93 J
Lead
D
7439-92-1
NS
fL
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
1L
0.18
0.14
0.29
0.44 J+
5.1
0.16
0.12
Magnesium
T
7439-95-4
NS
IL
11900
7830
9230
5360
4040
14700
13000
Manganese
D
7439-96-5
NS
IL
400
280
380
1600
1400
390
150
Manganese
T
7439-96-5
50
02L
p 1L
380
430
360
1500
1100
410
220
Mercury
❑
7439-97-6
NS
1L
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
1L
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
1L
40
23.5 J+
20.5
15.8 J+
16.5 J+
20.2 J+
22.3 J
Molybdenum
D
7439-98-7
NS
IL
2,9
2.8
1.3
0.5 U
0.5 U
20
21,3
Molybdenum
T
7439-98-7
NS
p 1L
3.2
2.5
1.9
0.5 U
0.29 J
21.4
19.9 J
Nickel
D
7440-02-0
NS
1L
0,85
1.5 J+
13
0,38 J+
7.8
1.1 J+
0.77
Nickel
T
7440-02-0
100
02L
1L
1.8
1.9 J+
2.7
8.6 J+
11.7
IA J+
1.4 J
Potassium
T
7440-09-7
NS
1L
5000 U
5000 U
5000 U
5000 U
5000 U
13500
14200
Selenium
D
778249-2
NS
p 1L
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
p /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
1L
15900
13800
15400
29400
29600
34400
158000
Strontium
D
7440-24-6
NS
1L
870
340
420
150
150
550
730
Strontium
T
7440-24-6
NS
1L
770
400
450
150
110
650
690
Thallium
D
7440-28-0
NS
1L
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
p IL
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
IL
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
p 1L
0.67 J
0.86 J
1.1
1 U
18.3
1.8
1.8 J
Zinc
D
7440-66-6
NS
1L
10 U
3 J+
21
15 J+
58
4.4 J
10 U
Zinc
T
7440-66-6
1000
02L
p IL
20
4 J+
43
13 J+
32
9.6 J+
3.7 J
Total Dissolved Solids
N
TDS
500000
02L
p IL
377000
249000
304000
183000
174000
410000
9050001
Total Organic Carbon
N
TOC
NS
1L
21000
1000 U
1000 U
650 J
760 J
12900
198000 J
Total Suspended Solids
N
TSS
-
NS
1L
14300
2500 U
37600
2500 U
69400
13300
68000 J
Alkalinity, CO3
Ni
ALK-CO3
NS
p 1L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
1L
133000
90900
87800
6200
3600 J
187000
197000
Alkalinity, lab
N
ALK-LAB
NS
1L
133000
90900 J- 1
87800
6200
3600 J
187000
197000
Chloride
N
16887-00-6
250000
02L
IL
18000
22100
21900
10200
10400
18800
33600 J
Nitrite as N
N
14797-65-0
--
1000
02L
p 1L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
1L
20 U
13 J+
20 U
20 UJ
20 U
17 J+
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
106000
71500
79400
81500
74200
129000
195000 J
Sulfide
N
18496-25-8
NS
/L
100 U
100 U
100 U
100 U
100 U
100 U
6500 J-
As(III)
T
7784-46-5
NS
1L
0.158
0.2 U
9.84 J
As V
T
10103-60-3
NS
IL
0.12
0.2 U
0.66
Chromium VI
T
18540-29-9
0.07
DHHS
p 1L
1.38
0:026 J+
0,871 J
Fe II
T
1345-25-1
NS
1L
10.1
119
7,3 J+
Fe(Ill)
T
1309-37-1
NS
p 1L
20 U
20 U
20 UJ
Mn II
T
134443-0
NS
/L
292
1540
406 J+
Mn(IV)
T
1313-13-9
NS
IL
85.2
2.5 UJ
16.9 J+
IV
T
10102-18-8
NS
IL
0.5 U
0.5 U
0.5 U
rSe
Se i
T
13410-01-0
NS
p IL
0.5 U
0.5 U
0.5 UJ
Uranium, Natural
T
7440-61-1
NS
1L
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 Namel10:
AB-30SR
AS-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
9/1012015
612412015
9111/2015
612912015
9110/2015
612512015
911012015
N
N
N
N
N
N
N
DR-AB-30BR-NS-36115
AB-30D
DR-AB-30D-NS-3015
AB-30S
DR-AB-30S-NS-3Q15
AB-35BR
DR-AB-35BR-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
CiIL
Radium-228
T
15262-20-1
NS
pCi1L
Uranium-233
T
13968-55-3
NS
1L
Uranium-234
T
13966-29-5
NS
1L
Uranium-236
T
13982-70-2
NS
I
1L
❑ ssolved Oxygen
N
❑D
NS
mqjI
0.2
0.6
2.83
0.2
0,84
0.02
Temp Celsius
N
TEMP
--
NS
Deg C
26.8
23
21.9
25.3
28.9
32
H (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
Slcm
555
443.9
264.6
255
618
585
Oxidation Reduction. Potential
N
ORP
NS
mV
-90.6
-90.1
281.7
293.3
124.7
-214A
GW Depth TOC
N
IGW DEPTH-T00
NS
ft
Notes:
pg/L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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
TQC = 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-51)
MW-10
MW-10
MW-10D
MW-10D
MW-11
Round i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round i (CSA Sampling)
6/18/2015
9/9/2015
6/2512015
9/1112015
612412015
9111/2015
6129/2015
N
N
N
N
N
N
N
AB-5D
DWAS-SD-NS-3015
MW-10
DR-MW-10-NS-3415
MW-10D
DR-MW-10D-NS-3015
MW-11
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
1L
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
1L
62 J
180
100 J
100 U
100 U
160
Antimony
D
7440-36-0
NS
1L
0.5 U
0.5 U
0.5 J
0.5 U
0.5 U
0.5 U
Antimony
T
744036--0
1
1 IMAC
p 1L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
D
7440-38-2
NS
1L
8.8
14A
0.5 J
0.5 U
0.5 U
0.5 U
Arsenic
T
7440-38-2
10
02L
p 1L
1 8.5
13.9
0.5 U
0.5 U
0.5 U
0,14 J
Barium
D
7440-39-3
NS
1L
89
64
29
40
45
63
Barium
T
7440-39-3
700
02L
1L
89
67
32
45
46
72
Beryllium
D
744041-7
NS
1L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.42
Beryllium
T
7440-41-7
4
IMAC
p 1L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.5
Boron
D
744042-8
NS
p 1L
560
630
460
440
460
240
Boron
T
7440-42-8
700
1 02L
p 1L
500
650
460
460
440
230
Cadmium
D
744043-9
NS
p 1L
0.08 J
0.08 U
0,08 U
0.08 J
0.08 J
0.034 J
Cadmium
T
7440-43-9
2
02L
1L
0,08 U
0,08 U
0,08 U
0.08 U
0,08 U
0,038 J
Calcium
T
7440-70-2
NS
1L
34900 J-
40100
41000
33600
33200
2850
Chromium
D
7440-47-3
NS
1L
0.2 J+
0.5 U
3.6
0,28 J+
0.5 U
0.36 J+
Chromium
T
744047-3
10
02L
p IL
3.3
1.2
6.6
0.27 J
0,34 J
1.2 J+
Cobalt
D
7440-48-4
NS
1L
1.9
5A
0,19 J
0,59
0,59
28.5
Cobalt
T
744048-4
1
IMAC
p 1L
1
5.5
0.28 J
0.57
0.57
29.2
Copper
D
7440-50-8
NS
1L
0.25 J
0,24 J
1 U
1 U
12
0.54 J+
Copper
T
7440-50-8
1000
02L
IL
0,51 J
0,51 J
1 U
0.43 J
0.45 J+
2 J+
Iron
D
7439-89-6
NS
1L
63
1100
50 U
130
120
50 U
Iron
T
7439-89-6
300
02L
p 1L
140
1400
50 J
170
150
400
Lead
D
7439-92-1
NS
1L
0.1 U
0A8 J
0.1 U
0.1 U
0,88
0,09 J+
Lead
T
7439-92-1
15
02L
1L
0.058 J
0.12
0.1 U
0.048 J
0.063 J
1.2 J+
Magnesium
T
7439-95-4
NS
1L
7180
7270
13600
11000
11000
1810
Manganese
D
7439-96-5
NS
IL
1000
1300
5 U
990
950
890
Manganese
T
7439-96-5
5D
02L
p 1L
1000
1300
13
1000
930
880
Mercury
❑
7439-97-6
NS
1L
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
1L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 UJ
0.2 U
Methane
N
74-82-8
NS
p 1L
19.1 J+
83.8
1.5 J+
1.5 J+
13
10 UJ
1.6 J+
Molybdenum
D
7439-98-7
NS
1L
3.6
4.4
0.5 U
0.13 J
0.15 J
0.5 U
Molybdenum
T
7439-98-7
NS
p 1L
3.5
4.4
0.5 U
0.13 J
0.13 J
0.5 U
Nickel
D
7440-02-0
NS
1L
3 J+
7
1 A
2.1
1.9
5.5 J+
Nickel
T
7440-02-0
100
02L
1L
4.2
7.8
2
2A
1.7 J+
5.6 J+
Potassium
T
7440-09-7
NS
1L
13900
13300
5000 U
5000 U
5000 U
5000 U
Selenium
D
778249-2
NS
p 1L
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
p 1L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
1L
28400
32800
15800
17300
18200
19800
Strontium
D
7440-24-6
NS
1L
390
470
690
270
300
54
Strontium
T
7440-24-6
NS
1L
380
460
720
300
300
59
Thallium
D
7440-28-0
NS
1L
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
p IL
0.024 J
0.1 U
0.1 U
0.1 U
0.1 UJ
0.023 J
Vanadium
D
7440-62-2
NS
1L
1 U
1 U
1 U
1 U
1 U
0.46 J
Vanadium
T
7440-62-2
0.3
IMAC
p 1L
0.77 J
1 U
1 U
1 U
1 U
2.6
Zinc
D
7440-66-6
NS
1L
3.8 J
10 U
10 U
10 UJ
10 U
5.7 J+
Zinc
T
7440-66-6
1000
02L
p IL
5.6 J+
3.7 J
10 U
10 U
10 U
6.8 J+
Total Dissolved Solids
N
TDS
500000
02L
p 1L
247000
253000
233000
297000
214000
213000
118000
Total Organic Carbon
N
TOC
NS
p 1L
1000 J
590 J
1200
1400
510 J
30100
1400
Total Suspended Solids
N
TSS
-
NS
1L
5000
7400
5000 U
2500 U
3300
38300
Alkalinity, CO3
Ni
ALK-CO3
NS
1L
5000 J
5000 U
5000 U
5000 U
5000 J
5000 U
5000 J
Alkalinity, HCO3
N
ALK-HCO3
NS
1L
131000
129000
124000
135000
95300
89200
5000 U
Alkalinity, lab
N
ALK-LAB
NS
1L
131000
129000
124000
135000
95300
89200
5000 U
Chloride
N
16887-00-6
250000
02L
1L
15500
14200
20400
22700
24100
23200
6500
Nitrite as N
N
14797-65-0
--
1000
02L
p 1L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
1L
20 U
20 U
1500
640 J-
11 J
20 UJ
110 J+
Sulfate
N
14808-79-8
250000
02L
p IL
45200
55700
26800
28800
41300
42200
48100
Sulfide
N
18496-25-8
NS
1L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
1L
As V
T
10103-60-3
NS
1L
Chromium VI
T
18540-29-9
0.07
DHHS
p 1L
Fe II
T
1345-25-1
NS
1L
Fe(Ill)
T
1309-37-1
NS
p 1L
Mn II
T
134443-0
NS
1L
Mn(IV)
T
1313-13-9
NS
p 1L
Se IV
T
10102-18-8
NS
1L
Se I
T
13410-01-0
NS
p IL
Uranium, Natural
T
7440-61-1
NS
1L
0.?d7 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-51)
AB-51)
MW-10
MW-10
MW-10D
MW-10D
MWA1
Round i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round i (CSA Sampling)
6/18/2015
9/9/2015
6/2512015
9/1112015
612412015
9111/2015
6129/2015
N
N
N
N
N
N
N
AB-5D
DWAS-SD-NS-3015
MW-10
DR-MW-10-NS-3415
MW-10D
DR-MW-10D-NS-3015
MW-11
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCill-
1 UJ
Radium-228
T
15262-20-1
NS
pCi1L
3 U
Uranium-233
T
13968-55-3
NS
1L
0.05 U
Uranium-234
T
13966-29-5
NS
1L
0.05 U
Uranium-236
T
13982-70-2
NS
I
1L
0.05 U
❑ ssolved Oxygen
N
00
NS
mqjI
0.2
5A
1.74
0.62
3.61
Temp Celsius
N
TEMP
--
NS
Deg C
24.8
20.8
20.4
19.1
24.5
H((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
Slem
431,1
340
330
336
160.5
Oxidation Reduction. Potential
N
CRP
NS
mV
-33.1
119
163
80
398
GW Depth TOC
N
IGW DEPTH -TOO
NS
ft
1
13.28
1
18,3
50
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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 NamellD:
MW-11
MW-11D
MW-308SR
MW-308BR
MW-310BR
MW-310BR
MW-311t3R
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
6115/2015
9/9/2015
6/1612015
9/912015
6/29/2015
N
N
N
N
N
N
N
DR-MW-11-NS-3415
MW-11D
MW-308BR
DR-MW-308BR-NS-3015
MW-310SR
DR-MW-31OBR-NS-3015
MW-311BR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
/L
100 U
100 U
9.7 J+
100 U
5.7 J
100 U
100 U
Aluminum
T
7429-90-5
NS
/L
790
740
483
120
659
580
910
Antimony
D
7440-36-0
NS
/L
0.5 U
0.5 U
0.22 J
0.5 U
0.32 J
I A
0.22 J
Antimony
T
7440-36-0
1
IMAC
p /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
/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
p /L
0.5 U
0,25 J
1,8
0.79
1.3
2.5
0.32 J
Barium
D
7440-39-3
NS
/L
71
54
69
69
56
33
94
Barium
T
7440-39-3
700
02L
/L
81
54
76 i
69
57
46
110
Beryllium
D
744041-7
NS
/L
0,46
0.2 U
0.2 U 7
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p 1L
0,46
0.2 U
0.2 U
01 U
0.2 U
0.2 U
0,2 U
Boron
D
744042-8
NS
p /L
290
91
260 J+
440
31 J
49 J
700
Boron
T
7440-42-8
700
02L
p /L
280
87
260
360
35 J+
40 J
690
Cadmium
D
744043-9
NS
p /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
/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
/L
3270
62500
169000
232000
34700
26100
53400
Chromium
D
7440-47-3
NS
/L
0.24 J
1.1 J+
0.5 U
0,17 J
1.7 J+
0.63
0,37 J+
Chromium
T
744047-3
10
02L
p IL
0.58
1.5 J+
1.5
0.8
2.3
2.8
3.3 J+
Cobalt
D
7440-48-4
NS
/L
33.9
0,5 U
0.32 J
14,7
0.5 U
0,5 U
0,52
Cobalt
T
744048-4
1
IMAC
p /L
30.5
0.22 J
0.6
9.3
0.2 J
0.21 J
0.84
Copper
D
7440-50-8
NS
/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
IL
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
/L
50 U
50 U
1190
7600
50 U
50 U
380
Iron
T
7439-89-6
300
02L
p /L
1300
850
1910
5300
377
410
1200
Lead
D
7439-92-1
NS
/L
0.24
0.1 U.!
0.1 U
0.1 U
0,1 UJ
0.058 J
0.1 UJ
Lead
T
7439-92-1
15
02L
/L
0.32
0.29 J+
0.22 J+
0.16
0.88
1.1
0.53 J+
Magnesium
T
7439-95-4
NS
/L
2090
8020
28000
42800
6510
3980
11200
Manganese
D
7439-96-5
NS
IL
930
100
2000
7700
120
8.2
570
Manganese
T
7439-96-5
50
02L
p /L
910
130
2200
5400
110
37
680
Mercury
❑
7439-97-6
NS
/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
/L
0.2 UJ
0,2 U
0.2 UJ
02 U
0.082 J+
0,2 U
0,2 U
Methane
N
74-82-8
NS
/L
2.1 J+
7.6 J+
27
32.8
10 U
4.4 J+
8.5 J+
Molybdenum
D
7439-98-7
NS
WIL
0.5 U
3A
7,6
0.61
1.8
3.4
5
Molybdenum
T
7439-98-7
NS
p /L
0.5 U
2A
8.1
1.8
1.9
2.9
5
Nickel
D
7440-02-0
NS
/L
6
1A J+
0.98 J+
11.9
0,35 J+
1.1
2,9 J+
Nickel
T
7440-02-0
100
02L
/L
5.9
1 A J+
1.7 J+
8.2
0.88 J+
2.3
4 J+
Potassium
T
7440-09-7
NS
/L
5000 U
3050 J
5000 U
5000 U
5000 U
5000 U
5910
Selenium
D
778249-2
NS
p /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
p /L
0.5 U
0.5 U
0.5 U
0.5 U
021 J
0.41 J
0,5 U
Sodium
T
7440-23-5
NS
/L
21200
14000
20100
23300
21200
23600
23800
Strontium
D
7440-24-6
NS
/L
64
480
1200
2000
190
160
920
Strontium
T
7440-24-6
NS
/L
64
510
1300
1700
200
190
980
Thallium
D
7440-28-0
NS
/L
0.1 U
0.1 U
0.1 U
0.1 U
0,1 UJ
0.1 U
01 U
Thallium
T
7440-28-0
0.2
IMAC
p /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
WIL
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
p /L
0.58 J
1 U
0.84 J
1 U
2.5
3.7
0.89 J
Zinc
D
7440-66-6
NS
/L
15
10 UJ
9.8 J+
3,1 J
10 U
10 U
3.8 J+
Zinc
T
7440-66-6
1000
02L
p /L
6.5 J
4.6 J+
6.8 J+
31
5.7 J
6.7 J
15 J+
Total Dissolved Solids
N
TDS
500000
02L
p /L
143000
304000
844000
1300000
183000
161000
318000
Total Organic Carbon
N
TOC
NS
/L
1500
1000 U
610 J
1000 U
800 J
840 J
27400
Total Suspended Solids
N
TSS
-
NS
!L
1 11400
9200
19700
16400
36700
41400
55300
Alkalinity, CO3
Ni
ALK-CO3
NS
p /L
5000 U
5000 U
10000 U
5000 U
10000 U
8800
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
/L
5000 U
124000
170000
140000
110000
73700
154000
Alkalinity, lab
N
ALK-LAB
NS
/L
5000 U
124000
170000
140000
110000
82500
154000
Chloride
N
16887-00-6
250000
02L
1L
7600
23600
11600
13100
11600
12700
22000
Nitrite as N
N
14797-65-0
--
1000
02L
p /L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
/L
100 J-
65 J+
20 U
11 J
20 U
20 U
14 J+
Sulfate
N
14808-79-8
250000
02L
p /L
48600
70000
323000
586000
14100
18700
53000
Sulfide
N
18496-25-8
NS
/L
100 U
100 U
200 U
100 U
1000 U
100 U
100 U
As(III)
T
7784-46-5
NS
/L
As V
T
10103-60-3
NS
/L
Chromium VI
T
18540-29-9
0.07
DHHS
p /L
Fe II
T
1345-25-1
NS
/L
Fe(Ill)
T
1309-37-1
NS
p /L
Mn II
T
134443-0
NS
/L
Mn(IV)
T
1313-13-9
NS
p /L
Se IV
T
10102-18-8
NS
!L
Se l
T
13410-01-0
NS
p /L
Uranium, Natural
T
7440-61-1
NS
!L
1 0,397
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 NamellD:
MWA1
MW-11D
MW-308SR
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
6115/2015
9/9/2015
6/1612015
9/912015
6/29/2015
N
N
N
N
N
N
N
DR-MW-11-NS-3415
MW-11D
MW-308BR
DR-MW-308BR-NS-3015
MW-310SR
DR-MW-31OBR-NS-3015
MW-311BR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCill-
2.02
Radium-228
T
15262-20-1
NS
pCi1L
3 U
Uranium-233
T
13968-55-3
NS
1L
0.05 U
Uranium-234
T
13966-29-5
NS
1L
0,05 U
Uranium-236
T
13982-70-2
NS
!L
0.05 U
❑ ssolved Oxygen
N
00
NS
m 1I
0.06
2,24
0.49
0.2
0,28
0.9
0,77
Temp Celsius
N
TEMP
--
NS
Deg C
19.8
22
31A
22.3
32.8
25.2
24
H (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
5.45
6.2
9.92
9.1
39.18
Spec. Cond. field
N
SC
NS
S/cm
147
454A
1096
1628
283.9
241.3
505
Oxidation Reduction. Potential
N
CRP
NS
mV
185
132.5
-20.4
-89
121:6
75.8
-120.9
GW Depth TOC
N
IGW DEPTH -TOO
NS
ft
13.84
18.1
Notes:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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 Name11D:
MW-311BR
MW-314SR
MW-314BR
MW-9
MW-911)
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
6/2512015
9111/2015
6/3012015
6124/2015
9/11/2015
N
N
N
N
N
N
DR-MW-311BR-NS-3015
MW-3148R
DR-MW-314BR-NS-3015
MW-9
MW-9D
DR-MW-9D-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
1L
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
IL
560
350
120
250
2400
1300
Antimony
D
7440-36-0
NS
1L
0.5 U
0.53
1.3
0.5 U
0.5 U
0.5 U
Antimony
T
744036--0
1
1 IMAC
p 1L
0,5 U
0,47 J
1.6
0,5 U
0.5 U
0,27 J
Arsenic
D
7440-38-2
NS
1L
0.18 J
0.36 J
1.7
0.14 J
0.5 U
0.5 U
Arsenic
T
7440-38-2
10
02L
p 1L
0.5 U
0.3 J
1,8 J+
0.27 J
0,21 J
0,12 J+
Barium
D
7440-39-3
NS
1L
94
19
20
64
4 J
3.5 J
Barium
T
7440-39-3
700
02L
1L
110
24
25
70
19
22
Beryllium
D
744041-7
NS
1L
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
p 1L
01 U
0,2 U
0,2 U
0,21
0.19 J
0,1 J
Boron
D
744042-8
NS
p 1L
790
510
460
50 U
1000
1000
Boron
T
7440-42-8
700
02L
p 1L
810
500
490
28 J
1000
1100
Cadmium
D
744043-9
NS
p 1L
0.08 U
0,08 U
0,08 U
0.08 U
0,15
0.059 J
Cadmium
T
7440-43-9
2
02L
1L
0,08 U
0,08 U
0,03 J
0,031 J
1,8
0.12
Calcium
T
7440-70-2
NS
1L
53900
47400
48600
11400
21100
20800
Chromium
D
7440-47-3
NS
1L
0.25 J
0.87 J+
0.32 J
2,5
0,45 J+
0.58
Chromium
T
744047-3
10
02L
p IL
2.1
5
0.96 J+
1.8 J+
7.1
3.6
Cobalt
D
7440-48-4
NS
1L
0.13 J
0.5 U
0,5 U
5,6
0.28 J
0,37 J
Cobalt
T
744048-4
1
IMAC
p 1L
0.52
0.34 J
0.17 J
6.4
1.5
2.7
Copper
D
7440-50-8
NS
1L
1.1
2,1 J+
43
1 UJ
0.34 J
8.4
Copper
T
7440-50-8
1000
02L
IL
0.72 J
1.2 J+
0.79 J+
10.9
8.7
3.1 J+
Iron
D
7439-89-6
NS
1L
470
50 U
28 J
340
50 U
50 U
Iron
T
7439-89-6
300
02L
p 1L
1100
380
160
990
2600
1400
Lead
D
7439-92-1
NS
1L
0.25
0,1 U
0.77
0.1 U
0.1 U
0.92
Lead
T
7439-92-1
15
02L
1L
0.38
0.21
0.15
1.4
1.6
0.78
Magnesium
T
7439-95-4
NS
1L
11500
13400
12900
7310
9180
9190
Manganese
D
7439-96-5
NS
IL
510
15
70
1600
540
610
Manganese
T
7439-96-5
50
02L
p 1L
540
25
65
1000
600
1100
Mercury
❑
7439-97-6
NS
1L
0.2 U
0.23
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
1L
0.2 U
0,2 U
0.2 U
0.095 J
0.2 U
0.2 U
Methane
N
74-82-8
NS
1L
11.4
2.5 J+
18.3
1.6 J+
10 a
12.8 J+
Molybdenum
D
7439-98-7
NS
1L
0,6
0,72 J+
21
0.1 J
9,7
9A
Molybdenum
T
7439-98-7
NS
p 1L
0:63
0.91
2
0.5 U
10.1
9.4
Nickel
D
7440-02-0
NS
1L
2,6
1.2 J+
1,5
1.7
2.6
33
Nickel
T
7440-02-0
100
02L
1L
3.1
3.4 J+
1.9 J+
1.2 J+
5.2
4.2 J+
Potassium
T
7440-09-7
NS
1L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
778249-2
NS
p 1L
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
p 1L
0.5 U
0,5 U
0.5 U
0,5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
1L
16900
11400
13200
14300
25400
26800
Strontium
D
7440-24-6
NS
1L
920
160
170
120
100
130
Strontium
T
7440-24-6
NS
1L
930
160
170
130
120
140
Thallium
D
7440-28-0
NS
1L
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
p IL
0.1 U
0.016 J
0.045 J+
0.1 U
0.035 J
0.016 J+
Vanadium
D
7440-62-2
NS
1L
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
p 1L
0.62 J
1.3
0.82 J
2.3
11.1
2.7
Zinc
D
7440-66-6
NS
1L
10 U
10 U
5.9 J
8,5 J
10 UJ
10 U
Zinc
T
7440-66-6
1000
02L
p IL
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
p 1L
1 272000
261000
289000
113000
238000
213000
Total Organic Carbon
N
TOC
NS
1L
1000 U
1000 U
1000 U
1700
1000 U
1000 U
Total Suspended Solids
N
TSS
-
NS
1L
18500
12600
14500
2500 U
49000
264000
Alkalinity, CO3
Ni
ALK-CO3
NS
p 1L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
1L
127000
56700
60000
35200
32400
29600
Alkalinity, lab
N
ALK-LAB
NS
1L
127000
56700
60000
35200
32400
29600
Chloride
N
16887-00-6
250000
02L
WIL
23000
30500
30500
13000 J-
20000
19900
Nitrite as N
N
14797-65-0
--
1000
02L
p 1L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
1L
20 U
20 U
20 U
230
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
53800
95800
98200
36100
87300
91400
Sulfide
N
18496-25-8
NS
1L
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
1L
As V
T
10103-60-3
NS
1L
Chromium VI
T
18540-29-9
0.07
DHHS
p 1L
Fe II
T
1345-25-1
NS
1L
Fe(Ill)
T
1309-37-1
NS
p 1L
Mn II
T
134443-0
NS
/L
Mn(IV)
T
1313-13-9
NS
1L
IV
T
10102-18-8
NS
1L
re
e I
T
13410-01-0
NS
p IL
Uranium, Natural
T
7440-61-1
NS
1L
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 NameflD:
MW-311BR
MW-314SR
MW-314BR
MW-9
MW-91)
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
6/2512015
9111/2015
6/3012015
6124/2015
9/11/2015
N
N
N
N
N
N
DR-MW-311BR-NS-3015
MW-3148R
DR-MW-314BR-NS-3015
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
CiIL
Radium-228
T
15262-20-1
NS
pCi1L
Uranium-233
T
13968-55-3
NS
1L
Uranium-234
T
13966-29-5
NS
1L
Uranium-236
T
13982-70-2
NS
I
1L
Dissolved Oxygen
N
00
NS
m 1I
0.25
0.99
0,38
1,68
0.52
0,21
Temp Celsius
N
TEMP
--
NS
Deg C
18
26.7
21.6
21.7
20.8
22.8
H (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
Slcm
807
414.9
306.2
219A
324
228.9
Oxidation Reduction. Potential
N
CRP
NS
mV
-47.1
108.3
-129.3
179.9
145
110.8
GW Depth TOC
N
IGW DEPTH -TOO
NS
ft
45.1
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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
TQC = 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 NameIID:
AS-10D
AS-10D
AS-12D
AS-12S
AS-12S
AS-213
AS-2111)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
6/812015
9/812015
619/2015
619/2015
918/2015
6117/2015
91312015
N
N
N
N
N
N
N
AS-10D
DR-AS-10D-NS-3015
❑R AS-12D_WG_20150609
AS-12S
DR-AS-I2S-NS-3015
AS-21)
DR-AS-2D-NS-3015
Constituent
Fractlon
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
NIL
578
810
13A J+
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pqII.
730
920
554 J+
100 U
760
650
Antimony
D
7440-36-0
NS
pWL
2.7
3A
0,24 J
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
p IL
2.9
3.8
0,23 J
0.5 U
0.16 J
0,5 U
Arsenic
D
7440-38-2
NS
pqIL
8.5
7.6
0.48 J
0.23 J
0.24 J
0.17 J
Arsenic
T
7440-38-2
10
02L
p L
8,9
7,5
0.52
0.28 J
0.29 J
0.38 J
Barium
D
7440-39-3
NS
pqIL
30
16
33
31
120
170
Barium
T
7440-39-3
700
02L
pqIL
32
19
37
29
130
190
Beryllium
D
7440-41-7
NS
pqJL
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
p IL
0.2 U
0.2 U
0.2 U
0.2 U
0.096 J
0,1 J
Boron
D
7440-42-8
NS
p IL
50 U
26 J
1000
1300
150
360
Boron
T
7440-42-8
700
02L
p L
29 J
31 J
1000
1200
160
410
Cadmium
D
7440-43-9
NS
p IL
0,08 U
0:08 U
0.2
0,036 J
0.08 u
0.08 U
Cadmium
T
7440-43-9
2
02L
uQJL
1 0,08 U
0,08 U
0,19
0.04 J
0.041 J
0,08 U
Calcium
T
7440-70-2
NS
IL
65000
49900
40700
45900
72500
96600
Chromium
D
7440-47-3
NS
pqjL
2 J
2,2
0.22 J+
0,49 J
0,58
0.73
Chromium
T
744047-3
10
02L
NIL
2.4
2.9
1.1 J+
1.1 J+
1.4
2.3
Cobalt
D
7440-48.4
NS
pqjL
0,5 U
0.5 U
2
1.2
1,6
0,81
Cobalt
T
744048-4
1
IMAC
p IL
0.5 U
0.5 U
2.2
1.3
2.1
1.2
Copper
D
7440-50-8
NS
pqjL
0,76 J+
3,6
0.4 J+
6,8
0.76 J+
0.46 J
Copper
T
7440-50-8
1000
02L
IL
1.2 J+
2.1
1.1 J+
0.46 J
1 UJ
1.1
Iron
D
7439-89-6
NS
pqIL
50 U
50 U
82,6
370
1800
1800
Iron
T
7439-89-6
300
02L
p IL
35.6 J
69
928
450
2900
2800
Lead
D
7439-92-1
NS
qjL
0,077 J
0,69
0.1 U
0,51
0.1 U
0.17
Lead
T
7439-92-1
15
02L
p IL
0.1 U
0.095 J
0.5 J+
0.11
0.54
0.48
Magnesium
T
7439-95-4
NS
pqjL
59.2 J
100 U
30600
35700
16700
27400
Manganese
D
7439-96-5
NS
p IL
5 U
5 U
420
330
1500
1900
Manganese
T
7439-96-5
SO
02L
p L
5 U
3A J
430
320
1500
2100
Mercury
D
7439-97-6
NS
p IL
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
pqJL
0.2 U
0.2 U
0.12 J
0.2 U
0.085 J+
0,2 U
Methane
N
74-82-8
NS
p IL
10 U
14.4 J+
10 U
9.4 J+
10 U
5.8 J+
Molybdenum
D
7439-98-7
NS
pqjL
3,8
4,5
2.8
0.59
1
0.84
Molybdenum
T
7439-98-7
NS
p IL
3.9
4.7
2.5
0,64
1
0.86
Nickel
D
7440-02-0
NS
pqIL
0.5 U
0.4 J
9,6
5,7
1.8 J+
1.6
Nickel
T
7440-02-0
100
02L
pqIL
0.23 J
0.92
9.8
5A
2.8 J+
2.4
Potassium
T
7440-09-7
NS
IL
5000 U
4210 J
5000 U
5000 U
3120 J
5000 U
Selenium
D
7782-49-2
NS
p IL
28.8
31.3
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
p IL
35.3
31
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
p iL
9700
11800
29000
33600
29700
26600
Strontium
D
7440-24-6
NS
pqIL
320
300
600
700
510
630
Strontium
T
7440-24-6
NS
pgYL
350
350
600
660
530
700
Thallium
D
7440-28-0
NS
pqjL
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
p IL
0.1 U
0.1 U
0.1 U
0.1 U
0.061 J
0.023 J+
Vanadium
D
7440-62-2
NS
pqjL
13.3
30.6
0.29 J
0.32 J
0.32 J
1 U
Vanadium
T
7440-62-2
0.3
IMAC
NIL
15.3
30.6
1.1
0.52 J
1.6
1.4
Zinc
D
7440-66-6
NS
pqIL
t0 U
3.3 J
10 U
27
8A J
2,7 J
Zinc
T
7440-66-6
1000
02L
p IL
5A J+
6.3 J
4,2 J+
43
16 J+
4.8 J
Total Dissolved Solids
N
TDS
500000
02L
p L
220000 J-
202000
350000
321000
405000
498000
Total Organic Carbon
N
TOC
NS
pqIL
1000 U
1600
1600
1500
1500
1200
Total Suspended Solids
N
TSS
NS
IL
1100
5000 U
89000
2500 U
189000
133000
Alkalinity, CO3
N
ALK-CO3
NS
p IL
63000
54900
10000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pQJL
23000
5000 U
190000
192000
170000
224000
Alkalinity, lab
N
ALK-LAB
-
NS
pqJL
100000
77200
190000
192000
170000
224000
Chloride
N
16887-00-6
250000
02L
PQJL
20300
19700
18700
21400
16900
17100
Nitrite as N
N
14797-65-0
1000
02L
L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
uWL
20 U
20 U
32
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
43900
43800
71700
83100 J-
90600
135000
Sulfide
N
18496-25-8
NS
IL
100 U
100 U
200 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pqjL
As V
T
10103-60-3
NS
pqjL
Chromium VI
T
18540-29-9
0.07
❑HHS
pq1L
Fe II
T
1345-25-1
NS
pqIL
Fe(Ill)
T
1309-37-1
NS
p IL
Mn II
T
1344-43-0
NS
piplL
Mn(IV)
T
1313-13-9
NS
pqJL
Se IV
T
10102-18-8
NS
/L
Se I
T
13410-01-0
NS
L
Uranium, Natural
T
7440-61-1
NS
pqIL
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 Name11D:
AS-10D
AS-10D
AS-12D
AS-12S
AS-12S
AS-213
AS-2D
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
6/812015
9/812015
619/2015
619/2015
918/2015
6117/2015
91312015
N
N
N
N
N
N
N
AS-10D
DR-AS-10D-NS-3015
❑R AS-12D_WG_20150609
AS-12S
DR-AS-I2S-NS-3015
AS-21)
DR-AS-2D-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi1L
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u 11
Uranium-234
T
13966-29-5
NS
u 1l
Uranium-236
T
13982-70-2
NS
ugh
❑ ssolved Oxygen
N
DO
NS
m 1L
2.38
2.2
1.29
025
0.12
Temp Celsius
N
TEMP
NS
Deg C
27.5
24.9
30.1
242
24.4
H (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
926
1.47
6.12
Spec. Cond. field
N
SC
NSPS/cm
582
3B8.5
606
643
553
Oxidation Reduction. Potential
N
ORP
NS
mV
104
-21.7
222.2
167.6
-180.9
GW Depth OC
N
JGW DEPTH-T{]
NS
I
I ft
26A2
18,43
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCVL = 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-41D
AS-4D
AS-41)
AS-61)
AS-6D
AS-88R
AS-8BR
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 GSA Sampling)
Round 2 3Q-2015
61512015
6126/2015
9/312015
618/2015
918/2015
6/9/2015
918/2015
N
N
N
N
N
N
N
AS-41)
AS-4111)
DR-AS-4D-NS-3015
AS-61)
DR-AS-6D-NS-3Q15
AS-8BR
DR-AS-BBR-NS-3Q15
Constituent
Fractlon
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
NIL
5.1 J
98 J
7.8 J
100 U
13.3 J+
100 U
Aluminum
T
7429-90-5
NS
pqIL
2990
1001
206
110
331 J+
100 U
Antimony
D
7440-36-0
NS
pWL
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
p IL
0,5 U
0,5 U
0.24 J
0,5 U
0.21 J
0.5 U
Arsenic
D
7440-38-2
NS
IL
1.5
1.5
1.5
0.86
0.16 J
0.5 U
Arsenic
T
7440-3B-2
10
02L
p L
1,8
1,6
2
0.88
0.34 J
0.12 J
Barium
D
7440-39-3
NS
pqIL
86
88
43
42
78
77
Barium
T
7440-39-3
700
02L
pqIL
97
100
45
49
95
86
Beryllium
D
7440-41-7
NS
pqJL
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
p IL
0,18 J
0,2 U
0.2 U
0.2 U
0.2 U
0,2 U
Boron
D
7440-42-8
NS
p IL
730
800
33 J
50 U
33 J
50 U
Boron
T
7440-42-8
700
02L
p L
810
930
37 J
25 J
45 J
50 U
Cadmium
D
7440-43-9
NS
p IL
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
uQJL
1 0,08 U
0.08 U
0,08 U
0,08 U
0,08 U
0,08 U
Calcium
T
7440-70-2
NS
IL
72800
88700
16300
18000
84600
66600
Chromium
D
7440-47-3
NS
pqjL
0,2 J+
0.19 J+
0.24 J
0.32 J
IA J+
0.3 J
Chromium
T
7440-47-3
10
02L
p IL
3.3
0.91 J+
0.47 J
1.9 J+
4.4
0.5 UJ
Cobalt
D
7440-48.4
NS
pqjL
2A
2.7
1A
0.59
0,5 U
0,5 U
Cobalt
T
7440484
1
IMAC
p IL
4
2.9
1.1
0.7
0.15 J
0.5 U
Copper
D
7440-50-8
NS
pqjL
1 UJ
1 UJ
1 U
0.78 J
1 U
1 U
Copper
T
7440-50-8
1000
02L
IL
3.6 J+
1 U
0.54 J+
0.84 J+
0,88 J
0.25 J+
Iron
D
7439-89-6
NS
pqIL
1 158
170
2880
3100
206
150
Iron
T
7439-89-6
300
02L
p 1L
4480
250 J+
3920
3400
466
170 J+
Lead
D
7439-92-1
NS
pqIL
0,089 J
0,059 J+
0.1 U
0.14
0,048 J+
0.1 U
Lead
T
7439-92-1
15
02L
p IL
1.7
0.28 J
0.087 J
0.24 J+
0.19 J+
0.1 U
Magnesium
T
7439-95-4
NS
pqjL
37500
44600
20300
26300
10800
11600
Manganese
D
7439-96-5
NS
p IL
700
770
260
220
790
920
Manganese
T
7439-96-5
SO
02L
p L
770
870
270
250
910
950
Mercury
D
7439-97-6
NS
p JL
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
uWL
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0,2 U
Methane
N
74-82-8
NS
p IL
41
221 J
68
106
20
15.6 J+
Molybdenum
D
7439-98-7
NS
pqjL
6,8
7,6
0.64
0.15 J
1 A J+
0.13 J
Molybdenum
T
7439-98-7
NS
p IL
7.2
7.8
0.35 J
0.2 J
1.8
0.14 J
Nickel
D
7440-02-0
NS
pqIL
2.1
2.5 J+
1.5 J
0.88
0,85 J+
0,34 J
Nickel
T
7440-02-0
100
02L
1L
5.2 J+
3
1,5
1.3 J+
1.2 J+
0.33 J+
Potassium
T
7440-09-7
NS
/L
2600 J
2770 J
5000 U
5000 U
4810 J
5000 U
Selenium
D
7782-49-2
NS
p IL
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
p IL
0.5 U
0.5 U
0.5 U
0,5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
p IL
22300
26100
20400
22800
14000
13000
Strontium
D
7440-24-6
NS
pqIL
920
970
150
150
400
380
Strontium
T
7440-24-6
NS
IL
980
1100
160
180
440
440
Thallium
D
7440-28-0
NS
pqjL
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
p IL
0.034 J
0.022 J+
0.1 U
0.1 U
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pqjL
1 U
1 U
1 U
1 U
1.4
1 U
Vanadium
T
7440-62-2
0.3
IMAC
NIL
4.8
1 U
0.69 J+
0.4 J
2.7
1 U
Zinc
D
7440-66-6
NS
pqIL
7,5 J
10 UJ
7.3 J
12
10 U
10 U
Zinc
T
7440-66-6
1000
02L
p IL
2.6 J+
10 U
12 J+
18
4.5 J+
10 U
Total Dissolved Solids
N
TDS
500000
02L
p L
410000 J-
432000
220000 J-
237000
370000
314000
Total Organic Carbon
N
TOC
NS
1L
1200
1200
640 J
2000 U
1000 U
1000 U
Total Suspended Solids
N
TSS
NS
/L
90000
47400
5500
12900
38000
2500 U
Alkalinity, CO3
N
ALK-CO3
NS
p IL
10000 U
5000 U
10000 U
5000'U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pQJL
310000
336000 J
140000
152000
150000
158000
Alkalinity, lab
N
ALK-LAB
-
NS
pqJL
310000
336000 J
140000
152000
150000
158000 J+
Chloride
N
16887-00-6
250000
02L
PQJL
21900
22400
16300
16500
8200
4800
Nitrite as N
N
14797-65-0
1000
02L
L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pqIL
20 U
20 U
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p 1L
44900
49400
15100
15600
74500
59700
Sulfide
N
19496-25-8
NS
IL
500 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
p IL
1.41
As V
T
10103-60-3
NS
pqjL
0.2 U
Chromium VI
T
18540-29-9
0.07
❑HHS
pq1L
0.007 J+
Fe II
T
1345-25-1
NS
pqIL
14B
Fe(Ill)
T
1309-37-1
NS
p JL
20 U
Mn II
T
1344-43-0
NS
L
951
Mn(IV)
T
1313-13-9
NS
pqJL
1 UJ
Se IV
T
10102-18-8
NS
/L
0,5 U
Se I
T
13410-01-0
NS
L
0.5 U
Uranium, Natural
T
1 7440-61-1
NS
pqIL
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 Name11D:
AS-41)
AS-4D
AS-41)
AS-61)
AS-6D
AS-88R
AS-8BR
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 GSA Sampling)
Round 2 3Q-2015
61512015
6126/2015
9/312015
618/2015
918/2015
6/9/2015
918/2015
N
N
N
N
N
N
N
AS-41)
AS-4D
DR-AS-4D-NS-3015
AS-61)
DR-AS-6D-NS-3Q15
AS-8BR
DR-AS-88R-NS-3Q15
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi1L
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u 11
Uranium-234
T
13966-29-5
NS
u 1l
Uranium-236
T
13982-70-2
NS
ugh
❑ ssolved Oxygen
N
DO
NS
m 1L
0.36
0.43
0.41
1,46
0,31
Temp Celsius
N
TEMP
NS
Deg C
25.2
27.8
24.8
24.6
19.8
H (field)
N
PH
6.5
8.5
02L
Su
6.24
6.02
6
7,09
T07
Turbidity. field
N
TURB
--
NS
NTU
7.49
9.3
8.32
51.38
0.88
Spec. Cond. (fieldl
SC
NS
S1cm
744
380.8
420.E
496.5
458
Oxidation Reduction. Potential
N
ORP
NS
mV
169.5
113.2
29.9
20
-59.4
GW Depth OC
N
JGW DEPTH -TO
--
NS
I ft
36.5
37,97
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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

Corrective Action Plan Part 2
Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name11D:
AS -OD
AS -OD
AS-$D
MW-301BR
MW-3018R
MW-3038R
MW-303RR
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)
612I2015
6126/2015
9/912015
6/11/2015
9/412015
611212015
6/2212015
N
N
N
N
N
N
N
AS-813
AS-8111]
DR-AS-8D-NS-3015
MW-301BR
DR-MW-301BR-NS-3015
MW-3038R
MW-303SR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
NIL
7 J
100 U
5.9 J
100 U
4.7 J
Aluminum
T
7429-90-5
NS
pqIL
1530
62 J
202
230 J'+
938
Antimony
D
7440-36-0
NS
pWL
1 UJ
0.5 U
0.5 U
0.5 U
0.16 J
Antimony
T
7440-36-0
1
IMAC
p IL
1 UJ
0.5 U
0,16 J
0,5 U
0,25 J
Arsenic
D
7440-38-2
NS
pqIL
1.2 J
0.41 J
0.84
0.64
6.4
Arsenic
T
7440-38-2
10
02L
p L
1,24 J
038 J
0,9
0,58
8,6
Barium
D
7440-39-3
NS
pqIL
64
69
33
21
69
Barium
T
7440-39-3
700
02L
pqIL
82
71
35
26
94
Beryllium
D
7440-41-7
NS
pqJL
1 UJ
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
1 UJ
0.2 U
0,2 U
0.2 U
0,2 UJ
Boron
D
7440-42-8
NS
p IL
50 UJ
50 U
50 U
50 U
50 U'
Boron
T
7440-42-8
700
02L
p L
50 UJ
50 U
50 U
50 U
29 J+
Cadmium
D
7440-43-9
NS
p IL
1 UJ
0,08 U
0.08 U
0:08 U
0,08 U
Cadmium
T
7440-43-9
2
02L
uQJL
1 UJ
0,08 UJ
0,08 U
0.08 U
0,08 U
Calcium
T
7440-70-2
NS
IL
47000
46700
43100
30200
34700
Chromium
D
7440-47-3
NS
pqjL
1 UJ
0.54
44
0,32 J
0,27 J
Chromium
T
744047-3
10
02L
NIL
1.9 J
0.25 J+
1.2 J+
1 J+
6.4
Cobalt
0
7440-48.4
NS
pqjL
1 UJ
0.5 U
0,19 J
0,16 J
0.18 J
Cobalt
T
744048-4
1
IMAC
p IL
1 UJ
0.5 U
0.26 J
0.24 J+
0.95
Copper
D
7440-50-8
NS
PQjL
1 UJ
1 U
1 U
1A
1 U
Copper
T
7440-50-8
1000
02L
IL
1 UJ
1 UJ
0.4 J
0.4 J
3.2 J+
Iron
D
7439-89-6
NS
pqIL
1160
700
146
330
2260
Iron
T
7439-89-6
300
02L
p IL
2900
890
383 J+
690 J+
2760
Lead
0
7439-92-1
NS
qjL
1 UJ
0.1 U
0.1 U
0.13
0.1 U
Lead
T
7439-92-1
15
02L
p IL
1 UJ
0.1 UJ
0.14 J+
0.18
1.2
Magnesium
T
7439-95-4
NS
pqjL
11300
12300
8200
7900
9480
Manganese
D
7439-96-5
NS
p IL
1100
1000
400
410
510
Manganese
T
7439-96-5
SO
02L
p L
1140
1000
410
400 J+
500
Mercury
D
7439-97-6
NS
p JL
0.05 U
0.2 U
0.2 U
0.2 U
0.2 U
Cu
T
7439-97-6
1
02L
L
0.05 U
0.2 U
0.2 U
0.2 U
0,2 U
Methane
N
74-82-8
NS
uo1L
10 U
24.5 J+
10 U
5.1 J+
10.2 J+
Molybdenum
0
7439-98-7
NS
pqjL
1 UJ
0,13 J
1,2
0,71
1,5
Molybdenum
T
7439-98-7
NS
p IL
1 UJ
0.16 J
1.3
0.69
2.1
Nickel
D
7440-02-0
NS
pqIL
1 UJ
033 J
2.4 J+
038 J
0.51 J+
Nickel
T
7440-02-0
100
02L
pqIL
1.59 J
0.28 J+
0.93 J+
0.68
4.8 J+
Potassium
T
7440-09-7
NS
1L
1810
5000 U
5000 U
5000 U
3420 J
Selenium
D
7782-49-2
NS
p IL
1 UJ
0.5 U
0.32 J
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
p IL
1 UJ
0,5 U
0,39 J
0,5 U
0,33 J
Sodium
T
7440-23-5
NS
p iL
15700
14500
10600
9730
17400
Strontium
D
7440-24-6
NS
pqIL
320
310
370
280
170
Strontium
T
7440-24-6
NS
pgYL
330
320
380
290
190
Thallium
D
7440-28-0
NS
pqjL
0.2 UJ
0.1 U
0.1 U
0.1 U
0,017 J
Thallium
T
7440-28-0
0.2
IMAC
p IL
0.2 UJ
0.1 U
0.035 J
0.02 J
0.056 J
Vanadium
D
7440-62-2
NS
pQJL
0.3 UJ
1 U
1.5
0.4 J
0.39.E
Vanadium
T
74,40-62-2
0.3
IMAC
NIL
1.88 J
1 U
1.8
0.811
3.7
Zinc
D
7440-66-6
NS
pqIL
12 J
10 U
IOU
13 J+
8.4 J
Zinc
T
7440-66-6
1000
02L
p IL
7 J
10 UJ
3.7 J
3 J
16
Total Dissolved Solids
N
TDS
500000
02L
p L
250000
236000
210000
215000 J+
272000
Total Organic Carbon
N
TOC
NS
pqIL
523
610 J
540 J
1000 U
760 J
Total Suspended Solids
N
TSS
NS
1L
38000
5000 U
9100
18200
13000 J
Alkalinity, CO3
N
ALK-CO3
NS
p IL
10000 U
5000 U
10000 U
5000 U
10000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pQJL
170000
160000
150000
108000
140000
Alkalinity, lab
N
ALK-LAB
-
NS
pqJL
170000
160000
150000
108000
140000
Chloride
N
16887-00-6
250000
02L
pqjL
6800
6600
4400
4200
8300
Nitrite as N
N
14797-65-0
1000
02L
L
10 UJ
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pqIL
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
p IL
25000
20600
3300
2400
14900
Sulfide
N
19496-25-8
NS
JL
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pqjL
0.593
As V
T
10103-60-3
NS
pqjL
0.2 U
Chromium VI
T
18540-29-9
0.07
❑HHS
p L
0.008 J+
Fe II
T
1345-25-1
NS
pqIL
974
Fe(Ill)
T
1309-37-1
NS
p JL
28300
Mn II
T
1344-43-0
NS
piplL
1210
Mn(IV)
T
1313-13-9
NS
pqJL
6A6
Se IV
T
10102-18-8
NS
pqjL
0.5 U
Se(VI)
T
13410-01-0
NS
L
0.5 U
Uranium, Natural
T
7440-61-1
NS
ijQIL
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 Name11D:
AS-81)
AS-8D
AS-$D
MW-301BR
MW-3018R
MW-3038R
MW-303RR
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)
61212015
6126/2015
9/912015
6/11/2015
9/412015
611212015
6/2212015
N
N
N
N
N
N
N
AS-813
AS-8D
DR-AS-8D-NS-3015
MW-301BR
DR-MW-301SR-NS-3015
MW-3038R
MW-303SR
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCi1L
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u 11
Uranium-234
T
13966-29-5
NS
u 1l
Uranium-236
T
13982-70-2
NS
ugh
❑ ssolved Oxygen
N
DO
NS
m 1L
0.35
0,26
0.51
0,27
Temp Celsius
N
TEMP
NS
Deg C
24.1
22.3
32A
32.7
H (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. (fieldl
SC
NS
PSI=
411.6
371
337.E
282.8
Oxidation Reduction. Potential
N
ORP
NS
mV
38.5
-35.7
44
26.2
GW Depth OC
N
JGW DEPTH -TO
NS
I ft
38.65
Notes:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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
TQC = 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 Name11D:
MW-3038R
MW-306BR
MW-306SR
MW-306SR
MW-3158R
MW-3156R
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
91412015
6/12/2015
6/22/2015
914/2015
6/19/2015
9/8/2015
N
N
N
N
N
N
DR-MW-303BR-NS-3015
MW-306BR
MW-306BR
DR-MW-306BR-NS-3015
MW-3158R
DR-MW-315BR-NS-3015
Constituent
Fractlon
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
NIL
100 U
7.9 J
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pqIL
660 J+
96.2 J-
600
790
100 U
Antimony
D
7440-36-0
NS
pWL
0,36 J
0.43 J
0.5 U
0.29 J+
0.5 U
Antimony
T
7440-36-0
1
IMAC
p IL
0.95
0,38 J
0.2 J
0.21 J
0,5 U
Arsenic
D
7440-38-2
NS
pqIL
2.5
1.1
0.9
0.16 J
0,18 J
Arsenic
T
7440-38-2
10
02L
p L
4,5
1
1
0.19 J
0.33 J
Barium
D
7440-39-3
NS
pqIL
71
150
140
58
59
Barium
T
7440-39-3
700
02L
pqIL
94
150
160
71
22
Beryllium
D
7440-41-7
NS
pqJL
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
0,095 J
0.2 U
0,2 U
0,2 U
0.16 J
Boron
D
7440-42-8
NS
p IL
50 U
940
1500
50 U
50 U
Boron
T
7440-42-8
700
02L
p L
50 U
920
1700
50 U
50 U
Cadmium
D
7440-43-9
NS
p IL
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
T
7440-43-9
2
02L
uQJL
1 0.08 U
0.08 U
0.08 U
0,08 U
0.029 J
Calcium
T
7440-70-2
NS
IL
38600
91500
143000
40200
48400
Chromium
D
7440-47-3
NS
pqjL
0.28 J
0,31 J
0,29 J
0.32 J+
0,19 J
Chromium
T
744047-3
10
02L
NIL
7.2
1 A J+
3.2 J+
24.8
6
Cobalt
D
7440-48.4
NS
pqjL
0,13 J
0,45 J
1,2
1.2 J+
0,48 J
Cobalt
T
744048-4
1
IMAC
p IL
0.46 J+
0.5 U
IA
2.2
2.6
Copper
D
7440-50-8
NS
PQjL
5,5
1 U
0,8 J+
1 U
1 U
Copper
T
7440-50-8
1000
02L
IL
28.3
1 U
1.4 J+
2.4
5.2 J+
Iron
D
7439-89-6
NS
pqIL
2200
582
3100
86
39 J
Iron
T
7439-89-6
300
02L
p IL
3400 J+
623 J
4000
1300
27 J
Lead
D
7439-92-1
NS
pqIL
0,28
0.1 U
0,065 J
0.1 U
0.11
Lead
T
7439-92-1
15
02L
p IL
0.68
0.095 J
0.43
0.81
1 A
Magnesium
T
7439-95-4
NS
pqjL
12200
26600
57900
22600
14900
Manganese
D
7439-96-5
NS
p IL
530
930
2200
1500
1100
Manganese
T
7439-96-5
SO
02L
p L
590 J+
920
2400
181i0
2,6 J+
Mercury
D
7439-97-6
NS
p JL
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pqJL
0.2 U
02 U
0.2 U
0,2 U
0.2 U
Methane
N
74-82-8
NS
p IL
13A J+
20.4 J+
10 UIJ
10.9 J+
4.6 J+
Molybdenum
D
7439-98-7
NS
pqjL
2,1
2.3
4.5
0,36 J+
0,21 J
Molybdenum
T
7439-98-7
NS
p IL
2.6
1.9
4.3
0.94
0,28 J
Nickel
D
7440-02-0
NS
pqIL
3
2 J+
3.5
1.2 J+
0.78
Nickel
T
7440-02-0
100
02L
pqIL
5
2.2 J+
4.1
16A
5.3
Potassium
T
7440-09-7
NS
IL
3740 J
4290 J
2970 J
5000 U
5000 U
Selenium
D
7782-49-2
NS
p IL
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
p IL
0,2 J
0.5 U
0,22 J
0,5 U
0.5 U
Sodium
T
7440-23-5
NS
p iL
19200
24200
32900
22100
15000
Strontium
D
7440-24-6
NS
pqIL
180
730
1200
420
460
Strontium
T
7440-24-6
NS
pgYL
210
740
1400
460
63
Thallium
D
7440-28-0
NS
pqjL
0.1 U
0.1 U
0.1 U
0,1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
p IL
0.018 J
0.1 U
0,018 J
0:024 J
0.028 J
Vanadium
D
7440-62-2
NS
pqjL
0,28 J
1.5
1 U
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
NIL
2
1.6
1.6
1.4
5.5
Zinc
D
7440-66-6
NS
pqIL
9 J+
2.5 J
19 J+
130
2.8 J
Zinc
T
7440-66-6
1000
02L
p IL
16
51
38
13
4.5 J
Total Dissolved Solids
N
TDS
500000
02L
p L
260000 J+
530000
778000 J+
277000
228000
Total Organic Carbon
N
TOC
NS
pqIL
580 J
900 J
530 J
810 J
1000 U
Total Suspended Solids
N
TSS
NS
IL
31200
6300 J
14100
222000
63600
Alkalinity, CO3
N
ALK-CO3
NS
p IL
5000 U
10000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
pQJL
145000
160000
190000
176000
148000
Alkalinity, lab
N
ALK-LAB
-
NS
pqJL
145000
160000
190000 J-
176000
148000
Chloride
N
16887-00-6
250000
02L
pqjL
9700
21600
29700
10400
5600
Nitrite as N
N
14797-65-0
1000
02L
L
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pqIL
20 U
20 U
20 UJ
20 U
20 UJ
Sulfate
N
14808-79-8
250000
02L
p IL
16700
187000
345000
38400
39500
Sulfide
N
18496-25-8
NS
7L
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
pqjL
As V
T
10103-60-3
NS
pqjL
Chromium VI
T
18540-29-9
0.07
❑HHS
pq1L
Fe II
T
1345-25-1
NS
pqIL
Fe(Ill)
T
1309-37-1
NS
p JL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
pqJL
Se IV
T
10102-18-8
NS
/L
Se I
T
13410-01-0
NS
L
Uranium, Natural
T
7440-61-1
NS
pqIL
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 Name11D:
MW-3038R
MW-306BR
MW-306SR
MW-306SR
MW-3158R
MW-3156R
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
91412015
6/12/2015
6/22/2015
914/2015
6/19/2015
9/8/2015
N
N
N
N
N
N
DR-MW-303BR-NS-3015
MW-306BR
MW-306BR
DR-MW-306BR-NS-3015
MW-3158R
DR-MW-315BR-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
Ci/L
Uranium-233
T
13968-55-3
NS
u !I
Uranium-234
T
13966-29-5
NS
u 1l
Uranium-236
T
13982-70-2
NS
ugh
❑ ssolved Oxygen
N
DO
NS
m 1L
0.48
2,51
0.63
Temp Celsius
N
TEMP
NS
Deg C
29.4
19.5
30
H (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. (fieldl
SC
NS
PSI=
727
368
385,3
Oxidation Reduction. Potential
N
ORP
NS
mV
3.3
-24.9
23
GW Depth OC
N
JGW DEPTH -TO
NS
ft
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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
TQC = 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 Name11D:
MW-317BR
MW-3181)
MW-318D
OW-303D
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 2 3Q-2015
6/512015
61212015
9/912015
9/12/2015
N
N
N
N
MW-317BR
MW-3180
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
NIL
520
21 J
100 U
100 U
Aluminum
T
7429-90-5
NS
pqIL
649
510
120
7400
Antimony
D
7440-36-0
NS
pWL
1
1 UJ
0.5 U
2
Antimony
T
7440-36-0
1
IMAC
p IL
2.1
1 UJ
0,5 U
2.9
Arsenic
D
7440-38-2
NS
IL
0.63
1 UJ
1
40.2
Arsenic
T
7440-38-2
10
02L
p L
0,71
1 UJ
0,93
55
Barium
D
7440-39-3
NS
pqIL
46
35 J
34
210
Barium
T
7440-39-3
700
02L
pqIL
58
41 J
37
320
Beryllium
D
7440-41-7
NS
pqJL
0,2'U
1 UJ
0.31
0,11 J
Beryllium
T
7440-41-7
4
IMAC
p IL
0.2 U
1 UJ
0,31
2,1
Boron
D
7440-42-5
NS
p IL
s0 U
1250
1300
1200
Boron
T
7440-42-8
700
02L
p L
44 J
1310
1300
1000
Cadmium
D
7440-43-9
NS
p IL
0,08 U
1 UJ
0.068 J
0,44
Cadmium
T
7440-43-9
2
02L
pqjL
0,08 U
1 UJ
0,068 J
0,65
Calcium
T
7440-70-2
NS
IL
107000
21100
24900
52800 J-
Chromium
D
7440-47-3
NS
pqjL
8,4
1 UJ
0.38 J
0.27 J+
Chromium
T
744047-3
10
02L
NIL
11
2.8 J
0.69 J+
15.1
Cobalt
D
7440-48.4
NS
pqjL
0.5 J
12,9 J
6.6
47.8
Cobalt
T
7440484
1
IMAC
p IL
0.5 J
13 J
6.7
53.2
Copper
D
7440-50-8
NS
pqjL
4.8 J+
1.38 J
2 J
1.4 J+
Copper
T
7440-50-8
1000
02L
IL
1.6 J+
9.7 J
0,56 J
37.6 J+
Iron
D
7439-89-6
NS
pqIL
50 J
588
490
9200
Iron
T
7439-89-6
300
02L
p IL
128
1150
720
14900
Lead
D
7439-92-1
NS
pqIL
0,77
1 UJ
0.36
0A49 J+
Lead
T
7439-92-1
15
02L
p IL
0.15
1 UJ
0.38
12.1
Magnesium
T
7439-95-4
NS
pqjL
670
12700
15400
26100
Manganese
D
7439-96-5
NS
p IL
IOU
607
390
5000
Manganese
T
7439-96-5
SO
02L
p L
8.7
577
430
4500
Mercury
D
7439-97-6
NS
p IL
0,2'U
0.05 J
0.2 U
0.2 JJ
Mercury
T
7439-97-6
1
02L
pqJL
0.2 U
0.05 U
0.2 U
0.2 U
Methane
N
74-82-8
NS
p IL
20 U
10 U
9.3 J+
131
Molybdenum
D
7439-98-7
NS
pqjL
5,1
1 UJ
0,5 U
5,5
Molybdenum
T
7439-98-7
NS
p IL
5.6
1 UJ
0.5 U
7A
Nickel
D
7440-02-0
NS
pqIL
0,5 UJ
12.4 J
10.7
20,1
Nickel
T
7440-02-0
100
02L
IL
0.54 J+
15A J
11.3
31.4 J+
Potassium
T
7440-09-7
NS
1L
15600
1700
5000 U
9510
Selenium
D
7782-49-2
NS
p IL
0,53
1 UJ
1.2
0.5 U
Selenium
T
7782-49-2
20
02L
p IL
0,75
1,03 J
1
2,2
Sodium
T
7440-23-5
NS
p IL
18700
35400
26500
35600
Strontium
D
7440-24-6
NS
pqIL
450
589
650
1800
Strontium
T
7440-24-6
NS
IL
570
604
650
1900
Thallium
D
7440-28-0
NS
pqjL
0.1 J
0.2 UJ
0.1 U
0,26
Thallium
T
7440-28-0
0.2
IMAC
p IL
0,1 J
0.2 UJ
0.1 U
0.56
Vanadium
D
7440-62-2
NS
pQJL
8.5
0.3 UJ
1 U
0.91 J
Vanadium
T
7440-62-2
0.3
IMAC
NIL
8.4
0.654 J
1 U
36.5
Zinc
D
7440-66-6
NS
pqIL
10 U
78
34 J
2700
Zinc
T
7440-66-6
1000
02L
p IL
10 UJ
71
25
3000
Total Dissolved Solids
N
TDS
500000
02L
p L
350000 J-
270000
257000
377000
Total Organic Carbon
N
TCC
NS
IL
1100
738
1200 J+
14900
Total Suspended Solids
N
TSS
NS
1L
14000 J-
9000
6200
1320000
Alkalinity, CO3
N
ALK-CO3
NS
p IL
130000
10000 U
5000 U
145000 J+
Alkalinity, HCO3
N
ALK-HCO3
NS
pQJL
10000 U
83000
71000
98000
Alkalinity, lab
N
ALK-LAB
-
NS
pqJL
270000
83000
71000
243000
Chloride
N
16887-00-6
250000
02L
pqjL
8000
9100
8800
29400
Nitrite as N
N
14797-65-0
1000
02L
L
10 UJ
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
pqIL
20 J
20 U
27
Sulfate
N
14808-79-8
250000
02L
p IL
15500
91000
90500
42900
Sulfide
N
19496-25-8
NS
7L
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
p IL
As V
T
10103-60-3
NS
pqjL
Chromium VI
T
18540-29-9
0.07
❑HHS
pq1L
Fe II
T
1345-25-1
NS
pqIL
Fe(Ill)
T
1309-37-1
NS
p IL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
pqJL
IV
T
10102-18-8
NS
pqjL
re
.(VI)
T
13410-01-0
NS
L
Uranium, Natural
T
7440-61-1
NS
pqIL
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 Name11D:
MW-317BR
MW-3181)
MW-318D
OW-303D
Round 1 (CSA Sampling)
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 2 3Q-2015
6/512015
61212015
9/912015
9/12/2015
N
N
N
N
MW-317BR
MW-3180
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
pCi1L
Radium-228
T
15262-20-1
NS
Ci/L
Uranium-233
T
13968-55-3
NS
u !I
Uranium-234
T
13966-29-5
NS
u 1l
Uranium-236
T
13982-70-2
NS
ugh
❑ ssolved Oxygen
N
DO
NS
m 1L
1.38
1.5
0,22
Temp Celsius
N
TEMP
NS
Deg C
21.1
21.1
26.9
H (field)
N
PH
6.5
8.5
02L
Su
11."
5.51
5.23
Turbidity. field
N
TURB
--
NS
NTU
3.12
10.63
6.08
Spec. Cond. field
N
SC
NS
PSI=
1399
404
379.3
Oxidation Reduction. Potential
N
ORP
NS
mV
-29.3
241.9
194.5
GW Depth OC
N
JGW DEPTH-Tod—NS
I it
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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 Gowngradient 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-1UD
GWA-11D
GWA-11D
GWA-115
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
61512015
9/3/2015
611012015
6130/2015
N
N
N
N
N
N
N
GWA-10D
GWA-10D
DR-GWA-10D-NS-3015
GWA-11D
DR-GWA-11D-NS-3015
GWA-11S
GWA-14D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
uglL
9
100 U
3.3 J
100 U
6.5 J
100 U
Aluminum
T
7429-90-5
NS
pqIL
6940
1100
425 J+
330
53
90 J
Antimony
D
7440-36-0
NS
uglL
1 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
T
7440-36-0
1
IMAC
NIL
1 U
0,5 U
0.5 U
0.5 U
0,18 J
0.5 U
Arsenic
D
7440-38-2
NS
IL
1 U
0.5 U
0.2 J
0.28 J
0.14 J
0.36 J
Arsenic
T
7440-38-2
10
02L
pIL
1 U
0.4 J
0.25 J
0,39 J
0,18 J
0.38 J
Barium
D
7440-39-3
NS
u IL
55
32
60
55
24
75
Barium
T
7440-39-3
700
02L
pgIL
136
65
64
63
25
78
Beryllium
D
7440-41-7
NS
u 1L
1 U
0.13 J
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
1 U
0,36
0.2 U
0.2 U
0,2 U
0.2 U
Boron
D
7440-42-8
NS
W IL
172
300
50 U
50 U
100
250
Boron
T
7440-42-8
700
02L
pgIL
298
310
50 U
50 U
110
260
Cadmium
D
7440-43-9
NS
u 1L
1 U
0.033 J
0.08 U
0.08 U
0.039 J
0.08 U
Cadmium
T
7440-43-9
2
02L
pgIL
1 1 U
0,049 J
0.08 U
0.08 U
0,046 J
0,08 U
Calcium
T
7440-70-2
NS
IL
24200
19800
48000
55500
9730
66200
Chromium
D
7440-47-3
NS
pgIL
1 U
2.2
0,28 J+
2.3 J+
7.7
0,28 J
Chromium
T
7440-47-3
10
02L
W IL
9.93
23.3
1 A J+
22+2
15.6
0.27 J+
Cobalt
D
7440-48-4
N
pgIL
2.11
0.71
1,2
1 A
2.9
0,2 J
Cobalt
T
7440-48-4
1
IMAC
W IL
3.45
1.1
II A
1.7
3.3
0.23 J
Copper
D
7440-50-8
NS
pgIL
7.79 J+
1.2
0,29 J+
4
0,28 J
0.28 J+
Copper
T
7440-50-8
1000
02L
W IL
8.24
4.2 J+
0,57 J+
1.3
0.44 J
1 UJ
Iron
D
7439-89-6
NS
IL
146
64
1180
2200
134
50 U
Iron
T
7439-89-6
300
02L
g IL
6040
1100
1700
3200
227
140
Lead
D
7439-92-1
NS
ppIL
1.04
0,16
0.1 U
0,41 J+
0,1 U
0.1 U
Lead
T
7439-92-1
15
02L
pgIL
9.42
2.3
0.26
0.24
0.11
0.1 U
Magnesium
T
7439-95-4
N5
pqIL
13100
13000
16600
20000
5140
7420
Manganese
D
7439-96-5
NS
pgIL
453
160
730
890
1200
290
Manganese
T
7439-96-5
50
02L
g IL
509
130
810
980
1200
300
Mercury
D
7439-97-6
NS
u IL
0.05 U
02 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
pgIL
0.05 U
0.2 U
0.2 U
0.2 U
0,81 J+
0.2 U
Methane
N
74-82-8
NS
lL
10 U
1.6 J+
27
11A J+
13
62 J+
Molybdenum
D
7439-98-7
NS
IL
1 U
0,095 J
0.97
11
0,46 J
12.5
Molybdenum
T
7439-98-7
NS
W IL
1 U
0.53
0,87
1.6
0.7 J+
13
Nickel
D
7440-02-0
NS
IL
6,43
8.8
1.1 J+
11.3
13.9
0.51
Nickel
T
7440-02-0
100
02L
pgIL
11.1
19.3
1.7 J+
20.5
17
0.46 J+
Potassium
T
7440-09-7
NS
pgIL
3210
5000 U
5000 U
5000 U
5000 U
5000 U
Selenium
D
7782-49-2
NS
IL
1 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pgIL
1 U
0.22 J
0.5 U
0.5 U
0,5 U
0.5 U
Sodium
T
7440-23-5
NS
W IL
23400
17800
18100
19300
12500
21100
Strontium
D
7440-24-6
NS
pgIL
381
360
440
450
240
1700
Strontium
T
7440-24-6
NS
u IL
481
430
480
500
240
1800
Thallium
D
7440-28-0
NS
pgIL
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
IL
0.256
0.03 J
0.1 U
0.1 UJ
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pgIL
0.324
0.29 J
1 U
1 U
0.34 J
0.5 J
Vanadium
T
7440-62-2
0.3
IMAC
W IL
3.36
1.3
1.2 J+
0.45 J
0.52 J
0_.67 J
Zinc
D
7440-66-6
NS
pgIL
13
45
11
3.7 J+
7.6 J
10 U
Zinc
T
7440-66-6
1000
02L
W IL
43 J+
110
43 J+
6 J
2.7 J+
4.1 J
Total Dissolved Solids
N
TDS
500000
02L
p IL
220000
208000
240000 J-
291000
10000 U
325000
Total Organic Carbon
N
TCC
NS
IL
459 J+
1100
930 J
1100
860 J
650 J
Total Suspended Solids
N
TSS
NS
pgIL
15000
14000
53000
3800
8600
6500
Alkalinity, CO3
N
ALK-0O3
NS
u IL
10000 U
5000 U
10000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
39000
39800
180000
187000
57000
132000
Alkalinity, lab
N
ALK-LAB
NS
IL
39000
39800
180000
187000
57000
132000
Chloride
N
16887-00-6
250000
02L
pgIL
14000
11300
10900
10700
10000
13800
Nitrite as N
N
14797-65-0
1000
02L
W IL
232
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
IL
290
20 U
20 U
75
20 UJ
Sulfate
N
14808-79-8
250000
02L
g IL
3300
72400
37100
37200
4400
88500
Sulfide
N
19496-25-8
NS
PqIL
4000 UJ
100 U
200 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
IL
0.2 U
As V
T
10103-60-3
NS
IL
0.2 U
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
0.105
Fe II
T
1345-25-1
NS
pgIL
92
Fe(Ill)
T
1309-37-1
NS
W IL
20 U
Mn II
T
134443-0
NS
L
296
Mn(IV)
T
1313-13-9
NS
IL
1 UJ
Se IV
T
10102-18-8
NS
IL
0.091
Se l
T
1341MI-0
NS
pgIL
0.5 U
Uranium, Natural
T
7440-61-1
NS
IL
Page 1 of 12

Table 2-9 Groundwater Results Gowngradient 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
61512015
9/3/2015
611012015
6130/2015
N
N
N
N
N
N
N
GWA-10D
GWA-10D
DR-GWA-10D-NS-3015
GWA-11D
DR-GWA-11D-NS-3015
GWA-11S
GWA-14D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCill-
Radium-228
T
15262-20-1
NS
Ci/L
Uranium-233
T
13968-55-3
NS
u 1L
Uranium-234
T
13966-29-5
NS
pg1L
Uranium-236
T
13982-70-2
NS
1L
❑ ssolved Oxygen
N
DO
NS
m IL
1.15
1.08
0,47
4.74
0.58
Temp Celsius
N
TEMP
NS
Deq C
18.8
28.7
26.1
26.7
19
H((field)
N
PH
6.5
8.5
02L
SU
5.82
5.4 1
6.71
5.83
7.34
Turbidity. field
N
TURB
--
NS
NTU
7.65
8.69
9.23
7.93
4.73
Spec. Cond. (fieldl
N
SC
NS
PS1cm
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:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCi1L = 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 7 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample NameIID:
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
9/912015
9/912015
9/11/2015
613012015
9110/2015
611112015
9/812015
N
N
N
N
N
N
N
DR-GWA-I4D-NS-3015
DR-GWA-I4S-NS-3015
DR-GWA-I4S-NS-3015
GWA-15D
DR-GWA-I5D-NS-3015
GWA-10
DR-GWA-I D-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
uglL
100 J
100 U
74 J
100 U
4 J
100 U
Aluminum
T
7429-90-5
NS
pqIL
100 U
58 J
660
1000
413
60 J+
Antimony
D
7440-36-0
NS
uglL
0.5 J
0.5 U
0.17 J
0.5 U
0,24 J
1.1
Antimony
T
7440-36-0
1
IMAC
NIL
0,5 U
0,5 U
0.5 U
0,5 U
0.31 J
1.3
Arsenic
D
7440-38-2
NS
IL
0.45 J
1.2
0.14 J
0,31 J
1
1.3
Arsenic
T
7440-38-2
10
02L
u IL
0.45 J
1.2
0,18 J
0.32 J
1.2
1 A
Barium
D
7440-39-3
NS
uglL
76
58
61
52
51
68
Barium
T
7440-39-3
700
021-
qlL
5 U
47
67
59
62
79
Beryllium
D
7440-41-7
NS
u IL
0.2 U
0.2 U
0.2'J
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
0,2 U
0,2 U
0.2 U
0,084 J
0.2 U
0.2 U
Boron
D
7440-42-8
NS
W IL
260
49 J
79
73
50 U
50 J
Boron
T
7440-42-8
700
02L
pgIL
50 U
28 J
86
80
50 U
50 J
Cadmium
D
7440-43-9
NS
ugIL
0:08 U
0.08 U
0:08 U
0,08 U
0.08 J
0,08 U
Cadmium
T
7440-43-9
2
02L
pgIL
1 0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0,08 U
Calcium
T
7440-70-2
NS
IL
71600
10600
140000 1
126000
54300
34000
Chromium
D
7440-47-3
NS
IL
0,32 J
0,34 J
0,38 J
0.19 J
0.73
0.23 J
Chromium
T
7440-47-3
10
02L
W IL
0.66 J+
13.6
1.2 J+
1.8
1.6 J+
0.31 J
Cobalt
D
7440-48-4
NS
pqIL
0,18 J
7.3
0,14 J
0,5 U
0.5 U
0,5 U
Cobalt
T
7440-48-4
1
IMAC
W IL
0.32 J
3.5
0.24 J
0.61
0.3 J
0.5 U
Copper
D
7440-50-8
NS
pgIL
0,64 J
1 U
11
0.67 J
1 U
1 U
Copper
T
7440-50-8
1000
02L
W IL
0,25 J+
0.69 J+
0.76 J+
1.8
1.1 J+
1 UJ
Iron
D
7439-89-6
NS
IL
1 85
4900
26 J
50 U
136
50 J
Iron
T
7439-89-6
300
02L
g IL
50 J
3200
$40
980
719
69 J+
Lead
D
7439-92-1
NS
ppIL
0,11
0.1 U
0.1 U
0.12
0.1 U
0.1 U
Lead
T
7439-92-1
15
02L
pgIL
0.14
0.1
0,33 J+
1.3
0.29 J+
0A U
Magnesium
T
7439-95-4
NS
pqIL
7570
6040
18900
18400
5610
4210
Manganese
D
7439-96-5
1
NS
pgIL
330
7600
260
220
600
300
Manganese
T
7439-96-5
I
50
02L
g IL
5 uJ
2300
270
220
680
300 J+
Mercury
D
7439-97-6
NS
u IL
0.2 U
0.2 U
0.2 J
0.2 U
0.2 U
0.2 U
Mercury
T
7439-97-6
1
02L
PgIL
0.2 U
0.2 U
0.2 U
0.087 J
0.2 U
0,2 U
Methane
N
74-82-8
NS
IL
338
8A J+
3.9 J+
5.2 J+
10 U
10.4 J+
Molybdenum
D
7439-98-7
NS
IL
13.3
2
0,93
1
2,6
3.9
Molybdenum
T
7439-98-7
NS
W IL
12.9
0.58
0.89
0.78
2.7
4.5
Nickel
D
7440-02-0
NS
IL
0,56
2,9
0,91
0.67
0,62 J+
0,5 U
Nickel
T
7440-02-0
100
02L
W IL
0.63 J+
10.9
1.1 J+
1.8
1 A J+
0.2 J+
Potassium
T
7440-09-7
NS
pgIL
5000 U
2990 J
5270
7580
6280
29700
Selenium
D
7782-49-2
NS
IL
0.5 J
0.5 U
0.22 J
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pgIL
0.5 U
0.5 U
0,24 J
0.5 U
0.5 U
0.5 U
Sodium
T
7440-23-5
NS
W IL
21200
14200
26700
29800
10500
15500
Strontium
D
7440-24-6
NS
pgIL
1800
200
3300
3200
260
260
Strontium
T
7440-24-6
NS
u IL
5 J
110
3300
2800
310
310
Thallium
D
7440-28-0
NS
pgIL
0.1 J
0.1 U
0.1 U
01 U
0.045 J
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
IL
0.1 J
0.1 U
CA J
0.024 J
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pgIL
1 U
1 U
0.86 J
1.2
1 U
0.38 J
Vanadium
T
7440-62-2
0.3
IMAC
W IL
0_.62 J
0.48 J
1.5
3.2
0.79 J
0.45 J
Zinc
D
7440-66-6
NS
pgIL
14
13
18
7.4 J
10 U
10 J
Zinc
T
7440-66-6
1000
02L
W IL
4.3 J
5.6 J
3.8 J
4.1 J
4.8 J
10 J
Total Dissolved Solids
N
TDS
500000
02L
p IL
335000
218000
705000
618000
220000
198000
Total Organic Carbon
N
TCC
NS
IL
1000 J
1500
540 J
560 J
1000 J
690 J
Total Suspended Solids
N
TSS
NS
pgIL
46900
4900
42900
13400
33000
2500 U
Alkalinity, CO3
N
ALK-0O3
NS
u IL
5000 U
5000 U
5000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
130000
77900
129000
94500
160000
126000
Alkalinity, lab
N
ALK-LAB
NS
IL
130000
77900
129000
94500
160000
126000
Chloride
N
16887-00-6
250000
02L
pgIL
13100
7500
13300
12700
1500
1700
Nitrite as N
N
14797-65-0
1000
02L
W IL
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
IL
20 U
20 U
20 UJ
21
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
g IL
90800
25700
307000
301000
4200
5400
Sulfide
N
19496-25-8
NS
pgIL
100 U
100 U
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
IL
As V
T
10103-60-3
NS
IL
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
Fe II
T
1345-25-1
NS
pgIL
Fe(Ill)
T
1309-37-1
NS
W IL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
pgIL
Se IV
T
10102-18-8
NS
IL
Se l
T
1341MI-0
NS
JgIL
Uranium, Natural
T
7440-61-1
NS
pcjtL
Page 3 of 12

Table 2-9 Groundwater Results Downgrad-sent of the Ash Basin and Ash Storage Areas - Round 7 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name1ID:
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
9/912015
9/912015
9/11/2015
613012015
9110/2015
611112015
9/812015
N
N
N
N
N
N
N
DR-GWA-I4D-NS-3015
DR-GWA-I4S-NS-3015
DR-GWA-I4S-NS-3015
GWA-15D
DR-GWA-I5D-NS-3015
GWA-10
❑R-GWA-ID-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u IL.
Uranium-234
T
13966--29-5
NS
pg1L
Uranium-236
T
13982-70-2
NS
/L
Dissolved Oxygen
N
DO
NS
m L
0,18
1.75
0.71
0.3
0,54
0.3
Temp Celsius
N
TEMP
NS
Deg C
29.9
26
20.6
21.2
19.7
18.7
H (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
s1cm
508
173.7
1576
873
389.2
287.9
Oxidation Reduction. Potential
N
oRP
NS
my
-45.5
61 A
156
84.8
-4.1
-78.8
GW Depth TOC
N
GW DEPTH -TO
NS
I
ft
6,32
9.8
23.34
33,05
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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 7 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Namefle:
GWA-1S
GWA-IS
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 i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
611712015
919/2015
6/10/2015
91812015
6/11/2015
9/4/2015
61412015
N
N
N
N
N
N
N
GWA-1S
DR-GWA-IS,NS•3015
GWA-2D
DR-GWA-2D-NS-3015
GWA-2S
DR-GWA-2S-NS-3015
GWA-3D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
uglL
100 U
100 U
5.8 J
100 U
3.4 J
100 U
9
Aluminum
T
7429-90-5
NS
pqIL
920
110
90.9
310
806
1100 J+
350
Antimony
D
7440-36-0
NS
uglL
0.37 J
0.9
0.55
0.25 J
0.5 U
1 U
Antimony
T
7440-36-0
1
IMAC
NIL
0.5 UJ
0,95
2.2
0,55
0.5 U
0,5 U
1 U
Arsenic
D
7440-38-2
NS
IL
0.5 U
0.5 U
1.1
1.5
0.5 U
1 U
Arsenic
T
7440-38-2
10
02L
p IL
0.18 J
0.5 U
1.3
1.7
0.14 J
0,39 J
1 U
Barium
D
7440-39-3
NS
uglL
6,2
7.7
40
41
18
17
9
Barium
T
7440-39-3
700
021-
qlL
12
8.6
56
46
26
27
13
Beryllium
D
7440-41-7
NS
u IL
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1 U
Beryllium
T
7440-41-7
4
IMAC
p IL
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
W IL
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Boron
T
7440-42-8
700
02L
pgIL
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Cadmium
D
7440-43-9
NS
ugIL
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
Cadmium
T
7440-43-9
2
02L
pgIL
1 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
IL
3450
2320
58200
43200
2690
2940
10800
Chromium
D
7440-47-3
NS
IL
2.2 J+
0,48 J
4.3
17
1A
12.3
Chromium
T
7440-47-3
10
02L
W IL
1318
1.6 J+
5.7
6.3
2.6
4.7
17.7
Cobalt
D
7440-48-4
NS
pgIL
2.4
1,5
0,5 U
0.5 U
1,9
1 U
Cobalt
T
7440-48-4
1
IMAC
W IL
3
1.5
0.5 U
0,3 J
2.3
1.4 J+
1.02
Copper
D
7440-50-8
NS
I PqIL
0.76 J+
2.4
0,49 J
6A
0.31 J+
1.03 J+
Copper
T
7440-50-8
1000
02L
W IL
3 J+
0.5 J
0.54 J
0.86 J+
0.92 J
2.3
2.99
Iron
D
7439-89-6
NS
IL
50 U
50 U
50 U
50 U
50 U
120
101
Iron
T
7439-89-6
300
02L
g IL
1200
170
86.7
230
909
1600 J+
411
Lead
D
7439-92-1
NS
ppIL
0.1 U
0,27
0.1 U
036
01 U
1 U
Lead
T
7439-92-1
15
02L
pgIL
0.51
0.069 J
0.23
0.34
0.4 J+
1.2
1.5
Magnesium
T
7439-95-4
NS
pqIL
3470
1790
3860
6700
1290
1190
8090
Manganese
D
7439-96-5
1
NS
pgIL
100
71
5 U
280
88
81
107
Manganese
T
7439-96-5
I
50
02L
g IL
120
74
25
280
94
46 J+
122
Mercury
D
7439-97-6
NS
u IL
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
IL
0,11 J+
0.2 U
0,79 J+
0.2 U
02 U
0.2 U
0.05 U
Methane
N
74-82-8
NS
IL
10 U
2.1 J+
10 U
3.6 J+
10 U
2.5 J+
10 U
Molybdenum
D
7439-98-7
NS
IL
0.11 J
0.5 U
3.3
1.7
0.12 J
1.01
Molybdenum
T
7439-98-7
NS
W IL
0.3 J
0.14 J
3.9
2.2
0.11 J
0.19 J
1.28
Nickel
D
7440-02-0
NS
IL
8.2
2,1
0,31 J
0,46 J
3,8
12.5
Nickel
T
7440-02-0
100
02L
W IL
10.3
2.3
0,47 J
1.2 J+
4.5 J+
4.3
16.9
Potassium
T
7440-09-7
NS
pgIL
5000 U
5000 U
5560
5000 U
5000 U
5000 U
796
Selenium
D
7782-49-2
NS
IL
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Selenium
T
7782-49-2
20
02L
pgIL
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
W IL
18400
15000
11400
9490
3750 J
3390 J
24900
Strontium
D
7440-24-6
NS
pgIL
53
35
210
260
25
23
155
Strontium
T
7440-24-6
NS
u IL
59
36
250
270
26
24
162
Thallium
D
7440-28-0
NS
pgIL
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
IL
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
I PgIL
1 U
1 U
0.5 J
0.33 J
1 U
0.3 U
Vanadium
T
7440-62-2
0.3
IMAC
W IL
1.5
0.39 J
0.57 J
0.65 J
1.3
4.1
0.3 U
Zinc
D
7440-66-6
NS
pgIL
1 3.5 J
22
10 U
10 U
6,6 J
9,1 J+
19
Zinc
T
7440-66-6
1000
02L
W IL
9.6 J+
27
3.1 J+
2.8 J
8.7 J
7 J
16 J+
Total Dissolved Solids
N
TDS
500000
02L
p IL
105000
56000 J
10000 U
198000
37000
96000 J+
160000
Total Organic Carbon
N
TCC
NS
IL
1900
1100
780 J
520 J
9300
960 J
412 J+
Total Suspended Solids
N
TSS
NS
pgIL
25000
2700
200000
97200
17000
58000
15000
Alkalinity, CO3
N
ALK-0O3
NS
u IL
10000 U
5000 U
18000
5000 U
10000 U
5000 U
10000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
37000
18700
29000
128000
16000
13600
75000
Alkalinity, lab
N
ALK-LAB
NS
IL
37000
18700
51000
128000
16000
13600
75000
Chloride
N
16887-00-6
250000
02L
pgIL
3600 J+
4200
5000
4100
1800
1700
22000
Nitrite as N
N
14797-65-0
1000
02L
W IL
57
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
IL
20 U
37
34
20 UJ
160 J+
190
Sulfate
N
14808-79-8
250000
02L
g IL
15100 J+
15100
3100
3700
640 J
1000
6200
Sulfide
N
18496-25-8
NS
pgIL
200 U
100 U
100 U
100 U
100 U
100 U
500 U
As(III)
T
7784-46-5
NS
IL
As V
T
10103-60-3
NS
IL
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
Fe(II)
T
1345-25-1
NS
pgIL
Fe(Ill)
T
1309-37-1
NS
W IL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
IL
Se IV
T
10102-18-8
NS
IL
Se l
T
1341MI-0
NS
Pq,I
Uranium, Natural
T
7440-61-1
NS
IL
Page 5 of 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 7 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Namefl0:
GWA-15
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 i (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
611712015
919/2015
6/10/2015
91812015
6/11/2015
9/4/2015
61412015
N
N
N
N
N
N
N
GWA-1S
DR-GWA-IS,NS•3015
GWA-2D
DR-GWA-2D-NS-3015
GWA-2S
DR-GWA-2S-NS-3015
GWA-3D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u 1L.
Uranium-234
T
13966--29-5
NS
pg1L
Uranium-236
T
13982-70-2
NS
/L
❑ ssolved Oxygen
N
DO
NS
m L
49.6
2.9
1
0.33
3,8
2.7
Temp Celsius
N
TEMP
NS
Deg C
23.8
19.7
31 A
28.5
35.9
18.5
H((field)
N
PH
6.5
8.5
02L
SU
5.97
5.7
8.98
7A4
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
ps1cm
105
111.2
187.2
346.5
50.1
244.7
Oxidation Reduction. Potential
N
ORP
NS
my
296.E
5.6
177
120.5
293.4
246.2
GW Depth TOC
N
JGW DEPTH -TO
NS
ft
32.9
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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
91412015
6/4/2015
914/2015
6/23/2015
91912015
6/1912015
9110/2015
N
N
N
N
N
N
N
DR-GWA-3D-NS-3Q15
GWA-3S
DR-GWA-3S-NS-3015
GWA-4D
DR-GWA-4D-NS-3Q15
GWA-4S
DR-GWA-4S-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
uglL
100 U
17
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pqIL
170
236
190 J'+
430
360
380
1700
Antimony
D
7440-36-0
NS
uglL
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
NIL
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
IL
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
u IL
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
uglL
6
45
38
20
26
27
39
Barium
T
7440-39-3
700
021-
qlL
9.3
49
34
26
31
32
60
Beryllium
D
7440-41-7
NS
u IL
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
p IL
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
W IL
27 J
50 U
50 U
240
250
200 J+
250
Boron
T
7440-42-8
700
02L
pgIL
26 J
50 U
50 U
250
250
190
250
Cadmium
D
7440-43-9
NS
uglL
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
pgIL
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
IL
11000
5830
2050
26500
20900
19500
19300
Chromium
D
7440-47-3
NS
IL
17.4
1 U
11
0,53
0.36 J
0.81
7
Chromium
T
7440-47-3
10
02L
W IL
39.7
1 U
4.2
1.2 J+
IA J+
3.2
35.2
Cobalt
D
7440-48-4
NS
pgIL
0.91
11.3
17.6
0,17 J
0.29 J
2.7
2.5
Cobalt
T
7440-48-4
1
IMAC
W IL
1.1
12.2
10.8
0.35 J
0.54
2.7
3.8
Copper
D
7440-50-8
NS
pgIL
2.6 J+
1 UJ
3,2
0,41 J
1 J
1 U
0.67 J
Copper
T
7440-50-8
loco
02L
W IL
1.8 J+
8.6
1.1
1.4 J'+
0." J
0,58 J
3.7
Iron
D
7439-89-6
NS
IL
220
14
50 U
50 U
29 J
50 U
150
Iron
T
7439-89-6
300
02L
g IL
460
190
220 J+
370 J+
330
530
2400
Lead
D
7439-92-1
NS
ppIL
0.27
1 U
0,28
0.1 U
0.12
0.1 U
0.067 J
Lead
T
7439-92-1
15
02L
pgIL
0.8
1 U
0.2
0.45 J+
0.53
0.29
1.7
Magnesium
T
7439-95-4
NS
pqIL
9140
4990
1920
6890
7530
5970
5940
Manganese
D
7439-96-5
1
NS
pgIL
76
480
380
23
70
560
510
Manganese
T
7439-96-5
1
50
02L
g IL
89
533
300 J+
33
90
590
540
Mercury
D
7439-97-6
NS
u IL
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
I pgIl-
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
IL
2 J+
l0 U
1.8 J+
12.7 J+
115
82
529
Molybdenum
D
7439-98-7
NS
IL
0,56
1 U
0,5 U
0,54 J+
0.15 1
11.9
12.8
Molybdenum
T
7439-98-7
NS
W IL
1.2
1 U
0.5 U
0.64
0.15 J
11.6
15.2
Nickel
D
7440-02-0
NS
IL
28A
8.27
9
0,68
0.94
4.5
21
Nickel
T
7440-02-0
100
02L
W IL
34.4
8.7
9
0.91 J+
1.3
4.5
23A
Potassium
T
7440-09-7
NS
pgIL
5000 U
2570
2700 J
5000 U
5000 U
4320 J
4390 J
Selenium
D
7782-49-2
NS
IL
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
pgIL
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
W IL
21100
11300
7040
17400
18600
17200
16600
Strontium
D
7440-24-6
NS
pgIL
160
84
53
310
290
290
340
Strontium
T
7440-24-6
NS
u IL
180
108
42
340
280
300
330
Thallium
D
7440-28-0
NS
pgIL
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
IL
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
pgIL
1 U
0.3 U
1 U
0.95 J
1 U
1 U
1 U
Vanadium
T
7440-62-2
0.3
IMAC
W IL
_ 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
pgIL
29
27
21 J+
10 U
9.8 J
2.6 J
4,6 J
Zinc
T
7440-66-6
1000
02L
W IL
20
20 J+
11
5.9 J+
3A J
3A J
8.5 J
Total Dissolved Solids
N
TDS
500000
02L
p IL
196000 J+
110000
83000 J+
188000
171000
152000
157000
Total Organic Carbon
N
TCC
NS
IL
1000 U
588 J+
2000 U
14000
1000 UJ
650 J
1000 U
Total Suspended Solids
N
TSS
NS
pgIL
24400
5000 U
2700 U
102000
63000
68100
601000
Alkalinity, CO3
N
ALK-0O3
NS
u IL
5000 U
10000 U
5000 U
5000 U
5000 U 1
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
73000
67000
19900
64700
47200 1
58800
63500
Alkalinity, lab
N
ALK-LAB
NS
IL
73000 J-
67000
19900
64700
47200 1
58800
63500
Chloride
N
16887-00-6
250000
02L
pgIL
21700
11000
4500
14200
13300 1
11400
11100
Nitrite as N
N
14797-65-0
1000
02L
W IL
31
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
IL
62 J-
30
20 U
20 U
20 U
20 U
Sulfate
N
14808-79-8
250000
02L
g IL
3900
73000
1800
47800
42700
38200
28700
Sulfide
N
18496-25-8
NS
pgIL
100 U
100 U
100 U
100 U
100 U
100 U
100 UJ
As(III)
T
7784-46-5
NS
IL
As V
T
10103-60-3
NS
IL
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
Fe II
T
1345-25-1
NS
pgIL
Fe(Ill)
T
1309-37-1
NS
W IL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
IL
IV
T
10102-18-8
NS
IL
rSe
Se l
T
1341MI-0
NS
pgIL
Uranium, Natural
T
7440-61-1
NS
IL
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
91412015
6/4/2015
914/2015
6/23/2015
91912015
611912015
9110/2015
N
N
N
N
N
N
N
DR-GWA-3D-NS-3Q15
GWA-3S
DR-GWA-3S-NS-3015
GWA-4D
DR-GWA-4D-NS-3Q15
GWA-4S
DR-GWA-4S-NS-3015
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u IL.
Uranium-234
T
13966--29-5
NS
pg1L
Uranium-236
T
13982-70-2
NS
/L
Dissolved Oxygen
N
DO
NS
m L
5,47
1,49
0,18
0.51
Temp Celsius
N
TEMP
NS
Deg C
19.1
22.6
27.1
23.9
H((field)
N
PH
6.5
8.5
02L
SU
5.51
6.9
6.3
6.39
Turbidity. field
N
TURB
--
NS
NTU
7,42
7.01
14.6
35.84
Spec. Cond. field
N
SC
NS
ps1cm
141.7
281.9
256,9
189.E
Oxidation Reduction. Potential
N
ORP
NS
my
303.7
180.E
51.9
60.8
GW Depth TOC
N
JGW DEPTH -TO
NS
ft
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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 Namefl0:
GWA-58R
GWA-58R
GWA-60
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)
611612015
9/912015
6/2912015
9/11/2015
6130/2015
9112/2015
6/23/2015
N
N
N
N
N
N
N
GWA-58R
DR-GWA-5BR-NS-3015
GWA-6D
DR-GWA-6D-NS-3015
GWA-6S
DR-GWA-6S-NS-3015
MW-21D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Aluminum
D
7429-90-5
NS
uglL
5.8 J
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pqIL
187
65 J
120
100 U
1300
220
100 U
Antimony
D
7440-36-0
NS
uglL
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
NIL
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
IL
0,85
0.31 J
0.98
0.96
2.4 J
3.1
0.41 J+
Arsenic
T
7440-38-2
10
02L
p IL
0,83
0,19 J
0.96
0,79
2,2 J
2.9
0,21 J
Barium
D
7440-39-3
NS
uglL
73
64
33
42
200
210
34
Barium
T
7440-39-3
700
021-
qIL
75
65
35
43
210
220
42
Beryllium
D
7440-41-7
NS
u IL
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
p IL
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
W IL
190
190
630
620
620
710
210
Boron
T
7440-42-8
700
02L
pgIL
190 J+
190
610
600 1
610
700
210
Cadmium
D
7440-43-9
NS
uglL
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
PqIL
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
IL
188000
174000
50500
45500
81100
83000
136000
Chromium
D
7440-47-3
NS
IL
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
W IL
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
pgIL
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
W IL
0.32 J
0.5 U
0.51
0.51
1.3 J
1.8
0.5 U
Copper
D
7440-50-8
NS
pgIL
1 UJ
1 U
0,32 J
0.64 J
5 U
0.29 J
4.5 J+
Copper
T
7440-50-8
loco
02L
W IL
1 UJ
1 U
1 UJ
1 U
3.2 J
0,39 J
1.5 J+
Iron
D
7439-89-6
NS
IL
210
190
7400
6700
25300
13600
690
Iron
T
7439-89-6
300
02L
g IL
307
260
7400
6700
21200
15200
550
Lead
D
7439-92-1
NS
ppIL
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
pgIL
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
pqIL
25900
27900
10400
10900
14100
12500
19100
Manganese
D
7439-96-5
1
NS
pgIL
620
630
1300
1200
3900
3700
940
Manganese
T
7439-96-5
I
50
02L
g IL
630
650
1300
1200
3700
3800
920
Mercury
D
7439-97-6
NS
u IL
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
IL
0,2 UJ
0.2 U
0,2 U
0,2 U
0,2 U
02 U
0,2 U
Methane
N
74-82-8
NS
IL
17
16.9 J+
3080
2920
744 J
2740
16.9 J+
Molybdenum
D
7439-98-7
NS
IL
0,44 J
0,22 J
3.3
5A
13.7
8.6
0.34 J+
Molybdenum
T
7439-98-7
NS
W IL
0.55
0.23 J
3
5.2
9.2
8
0,31 J
Nickel
D
7440-02-0
NS
IL
1 J+
0,82
2.2
2
1.4 J
1,8
0.75 J+
Nickel
T
7440-02-0
100
02L
W IL
1.1 J+
0.85
2.1 J+
1.9
2.9
1.9
0.58 J+
Potassium
T
7440-09-7
NS
pgIL
5000 U
5000 U
5000 U
5000 U
12000
10700
5000 U
Selenium
D
7782-49-2
NS
IL
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
pgIL
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
W IL
29600
21000
28200
27000
24700
26200
15800
Strontium
D
7440-24-6
NS
pgIL
2300
2100
190
190
860
680
810
Strontium
T
7440-24-6
NS
u IL
2300
2100
200
200
850
710
960
Thallium
D
7440-28-0
NS
pgIL
0,1 UJ
0.1 U
0.1 U
R1 U
0.14 J
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
IL
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
pgIL
1 U
1 U
1 U
1 U
5 U
1.2
1 U
Vanadium
T
7440-62-2
0.3
IMAC
W IL
0.49 J_
1 U
1 U
1 U
6.5
1.1
1 U
Zinc
D
7440-66-6
NS
pgIL
23
6,6 J
10 U
5.7 J
2.7 J
13
32 J+
Zinc
T
7440-66-6
1000
02L
W IL
6.6 J
10 U
10 UJ
6.4 J
27 J+
4.8 J
10 U
Total Dissolved Solids
N
TDS
500000
02L
p IL
873000
799000
302000
293000
432000
340000
639000
Total Organic Carbon
N
TCC
NS
IL
26800
1000 UJ
1400
23200
34800
7800
1000 U
Total Suspended Solids
N
TSS
NS
pgIL
10700
2900
15000
6200
67000
371000
3500
Alkalinity, CO3
N
ALK-0O3
NS
u IL
10000 U
5000 U
5000 U
5000 U
5000 U
5000 UJ
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
150000
154000
124000
92100
290000
317000
161000
Alkalinity, lab
N
ALK-LAB
NS
IL
150000
154000
124000 J+
92100
290000
317000
161000
Chloride
N
16887-00-6
250000
02L
pgIL
17500
18200
16300
18300
18500
18900
17700
Nitrite as N
N
14797-65-0
1000
02L
W IL
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
PgIL
20 U
20 U
22 J+
20 UJ
20 U
16 J-
20 U
Sulfate
N
14808-79-8
250000
02L
g IL
416000
362000
88700
97700
10900
2300
274000
Sulfide
N
18496-25-8
NS
pgIL
100 U
100 U
100 UJ
100 U
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
IL
As V
T
10103-60-3
NS
IL
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
Fe II
T
1345-25-1
NS
pgIL
Fe(Ill)
T
1309-37-1
NS
W IL
Mn II
T
1344-43-0
NS
L
Mn(IV)
T
1313-13-9
NS
IL
Se IV
T
10102-18-8
NS
IL
Se l
T
1341MI-0
NS
pgIL
Uranium, Natural
T
7440-61-1
NS
IL
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 Namefl0:
GWA-5614
GWA-58R
GWA-60
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)
611612015
9/912015
6/2912015
9/11/2015
6130/2015
9112/2015
6/23/2015
N
N
N
N
N
N
N
GWA-58R
DR-GWA-5BR-NS-3015
GWA-6D
DR-GWA-6D-NS-3015
GWA-6S
DR-GWA-6S-NS-3015
MW-21D
Constituent
Fraction
CAS RN
Criteria Min
(range
only)
Groundwater
Criteria
Criteria
Source
Unit
Radium-226
T
13982-63-3
NS
pCiIL
Radium-228
T
15262-20-1
NS
Ci1L
Uranium-233
T
13968-55-3
NS
u 1L.
Uranium-234
T
13966--29-5
NS
pg1L
Uranium-236
T
13982-70-2
NS
/L
❑ ssolved Oxygen
N
DO
NS
m L
0,42
0,35
18
0.3
0.2
0.34
Temp Celsius
N
TEMP
NS
Deg C
23.7
22.4
18.6
20.5
21.1
23.4
H((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. (fieldl
N
SC
NS
s1cm
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-TOCJ
NS
ft
18.85
19,7
Notes:
pg1L = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
my = millivolts
NTU - nephelometric turbidity units
pCiIL = 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 Qowngradient 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 NamellD:
Mw-21D
Mw-21D
MW-21$
MW-21S
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 3Q-2015
612412015
911012015
6124/2015
911012015
N
N
N
N
Mw-210
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
uglL
100 U
100 U
100 U
Aluminum
T
7429-90-5
NS
pqIL
250
100 U
94 J
Antimony
D
7440-36-0
NS
uglL
0.5 U
0.3 J
0.18 J
Antimony
T
7440-36-0
1
IMAC
NIL
0.5 U
0,29 J
0.5 U
Arsenic
D
7440-38-2
NS
IL
0.12 J
16.9
34.2
Arsenic
T
7440-38-2
10
02L
p IL
0,17 J
16.8
42.8
Barium
D
7440-39-3
NS
uglL
38
33
40
Barium
T
7440-39-3
700
021-
qlL
40
38
45
Beryllium
D
7440-41-7
NS
u IL
0.2 U
0.2 U
0.2 U
Beryllium
T
7440-41-7
4
IMAC
p IL
0.2 U
0,2 U
0.2 U
Boron
D
7440-42-8
NS
W IL
210
180
250
Boron
T
7440-42-8
700
02L
pgIL
210
190
260
Cadmium
D
7440-43-9
NS
uglL
0.08 U
0.03 J
0,08 U
Cadmium
T
7440-43-9
2
02L
pgIL
0.08 U
0,08 U
0.08 U
Calcium
T
7440-70-2
NS
IL
144000
22000
23400
Chromium
D
7440-47-3
NS
IL
0,19 J
0.22 J+
0,5 U
Chromium
T
7440-47-3
10
02L
W IL
0.92
0.28 J+
0.34 J
Cobalt
D
7440-48-4
NS
pgIL
0.5 U
0,72
1.1
Cobalt
T
7440-48-4
1
IMAC
W IL
0.5 U
0.79
1.5
Copper
D
7440-50-8
NS
pgIL
18
1 UJ
0,27 J
Copper
T
7440-50-8
loco
02L
W IL
1.2
1 UJ
1 U
Iron
D
7439-89-6
NS
IL
160
50 U
50 U
Iron
T
7439-89-6
300
02L
g IL
440
50 U
120
Lead
D
7439-92-1
NS
ppIL
0,25
0,1 UJ
0.1 U
Lead
T
7439-92-1
15
02L
pgIL
0.45
0.1 U
0.088 J
Magnesium
T
7439-95-4
NS
PqIL
19900
5420
6160
Manganese
D
7439-96-5
1
NS
pgIL
870
640
740
Manganese
T
7439-96-5
I
50
02L
g IL
850
670
760
Mercury
D
7439-97-6
NS
u IL
0.2 U
02 U
02 U
Mercury
T
7439-97-6
1
02L
IL
0.2 U
0,2 U
0.2 U
Methane
N
74-82-8
NS
IL
35.8 J
8.5 J+
764 J
Molybdenum
D
7439-98-7
NS
IL
0,32 J
20.7
197
Molybdenum
T
7439-98-7
NS
W IL
0.3 J
19.9
24.3
Nickel
D
7440-02-0
NS
IL
0,6
1.2 J+
1.2
Nickel
T
7440-02-0
100
02L
W IL
1
1.1 J+
1.6
Potassium
T
7440-09-7
NS
pgIL
5000 U
4080 J
4880 J
Selenium
D
7782-49-2
NS
IL
0.5 U
0.5 U
0.5 U
Selenium
T
7782-49-2
20
02L
pgIL
0,5 U
0,5 U
0,5 U
Sodium
T
7440-23-5
NS
W IL
18300
12900
15600
Strontium
D
7440-24-6
NS
pgIL
950
320
420
Strontium
T
7440-24-6
NS
u IL
890
370
420
Thallium
D
7440-28-0
NS
pgIL
0.1 U
0.1 U
0.1 U
Thallium
T
7440-28-0
0.2
IMAC
IL
0.1 U
0.1 U
0.1 U
Vanadium
D
7440-62-2
NS
pgIL
1 U
1.6
0.41 J
Vanadium
T
7440-62-2
0.3
IMAC
W IL
0.72 J_
1.5
0.76 J
Zinc
D
7440-66-6
NS
pgIL
10 U
10 UJ
10 U
Zinc
T
7440-66-6
1000
02L
W IL
2.9 J
10 UJ
2.9 J
Total Dissolved Solids
N
TDS
500000
02L
p IL
599000
137000
151000
Total Organic Carbon
N
TCC
NS
IL
1000 U
1000 U
650 J
Total Suspended Solids
N
TSS
NS
pgIL
4700
5000 U
4000
Alkalinity, CO3
N
ALK-0O3
NS
u IL
5000 U
5000 U
5000 U
Alkalinity, HCO3
N
ALK-HCO3
NS
L
152000
58200
76900
Alkalinity, lab
N
ALK-LAB
NS
IL
152000
58200
76900
Chloride
N
16887-00-6
250000
02L
pgIL
17900
11200
11700
Nitrite as N
N
14797-65-0
1000
02L
W IL
Nitrogen, NO2 plus NO3
N
NO2-NO3
NS
PgIL
20 U
20 UJ
20 U
Sulfate
N
14808-79-8
250000
02L
g IL
269000
37000
23200
Sulfide
N
18496-25-8
NS
pgIL
100 U
100 U
100 U
As(III)
T
7784-46-5
NS
IL
0.2 U
1.04
As V
T
10103-60-3
NS
IL
0,2 U
17,9
Chromium VI
T
18540-29-9
0.07
DHHS
W IL
0.0103303103000000
0.029 J+
Fe II
T
1345-25-1
NS
pgIL
192
20 U
Fe(Ill)
T
1309-37-1
NS
W IL
431
7.1
Mn II
T
1344-43-0
NS
L
1020
645
Mn(IV)
T
1313-13-9
NS
IL
17.44583628380
24.6
Se IV
T
10102-18-8
NS
IL
0.5 u
0.5 U
Se l
T
1341MI-0
NS
pgIL
0.5 U
0.5 U
Uranium, Natural
T
7440-61-1
NS
IL
Page 11 of 12

Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 7 and Round 2
Corrective Action Plan Part 2
Dan River Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample NameflD:
MW-210
MW-21D
MW-21S
Mw-21S
Round 1 (CSA Sampling)
Round 2 3Q-2015
Round 1 (CSA Sampling)
Round 2 301-2015
612412015
9/1012015
612412015
9/1012015
N
N
N
N
MW-210
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
pCi1L
Radium-228
T
15262-20-1
NS
CifL
Uranium-233
T
13968-55-3
NS
/L.
Uranium-234
T
13966-29-5
NS
IL
Uranium-236
T
13982-70-2
NS
IL
Dissolved Oxygen
N
DO
NS
m IL
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. (fieldl
SC
NS
ps1cm
820
250
Oxidation Reduction Potential
N
ORP
NS
my
-12
140
GW Depth TOC
N
JGW DEPTH -TO
NS
I
I ft
3.9
5,18
Notes:
pg1L = micrograms per liter
µS1cm = microsiemens per centimeter
ft = feet
mV = millivolts
NTU - nephelometrlc turbidity units
pCi11L = 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
Criteria Source:
Turbidity,._
02L
11
02L
I 50
02L
0,07
DHHS
IMAC
1
02L
4
IMAC
Boron
700
02L
10
02L
.bManganese
1
IMAC
300
02L
50
02L
20
1
PPBC (Minimum (for ranges)):
I SCREENING 1 •
®®®
• 1
��®®®���®
Result Flagi'
��
• • •
��r�a���a����s��®����_��
.:. , ,
���
,
_era
Page 1 of 6

Table 2-10 Constituents of Interest Evaluation
Corrective Action Pan Part 2
Dan River Steam Station Ash Basin
NC GW Criteria;
Turbidity,pH
83
Iron
11
Manganese.
I 50
0,07
1
4
Boron
1 700
10
...Manganese
1
300
15
50
20
PPBC (Minimum (for ranges)):,
SCREENING ONO
•�®��®�a�a_��a�a-a��_�'®®a_
. , I
_ate
�a�
.•�®���s�aa�a�a�a�a�a_a_a�a�
., I
�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
pglL
300
02L
Manganese
T
pglL
50
02L
Chromium (VI)
T
pglL
0,07
DHHS
Antimony
T
pglL
1
IMAC
Arsenic
T
pglL
10
02L
Beryllium
T
pglL
4
1MAC
Boron
T
NgIL
700
02L
Chromium
T
pglL
10
02L
Cobalt
T
pglL
1
IMAC
Iran
T
pglL
300
02L
Lead
T
pg/L
15
02L
Manganese
T
pglL
50
02L
Selenium
T
pg L
20
02L
PPBC (Minimum (for ranges)):
PPBC:
SCREENING ONLY
10
6.65
6.78
-
lit
-
63
-
0.09
-
1
-
1
-
0.21
-
50
-
5
-
0.5
-
10
-
10
-
63
-
1
Well
matrix
Event
date
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
1 Result Flag
1 Result Flag
I Result Flag
I Result Flag
I Result Flag
I Result Flag
Result Flag
Result Fla
MW-308BR
WG
Round 2
919/2015
6.2
9.3
5300
5400
MW-310BR
WG
Round 1
6116120115
9.92
377
110
MW-310BR
WG
Round 2
919/2015
9.1
8.8
410
MW-311BR
WG
Round 1
6/29/2015
39.18
-
-
-
-
1200
580
MW-311BR
WG
Round 2
9/1112015
20.6
-
-
810
1100
540
MW-314SR
lWG
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
WIW2015
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
615/2015
3.12
11.44
2.1
11
-
MW-317BR
WG
Round 2
91812015
7.4
11:6
5.6
14.8
-
MW-318D
WG
Round 1
6/2/2015
10.63
5.51
-
-
1310
-
13
1
1150
577
MW-318D
WG
Round 2
9/912015
6.08
5.23
1300
6.7
720
430
MW-9
WG
Round 1
6130/2015
84.09
-
-
-
-
6.4
990
1000
MW-9D
WG
Round 1
612412015
66
-
1000
1.5
2600
600
MW-90
WG
Round 2
901I2015
48.29
6.44
-
-
1100
2.7
P 1400
1
1100
OW-303D
WG
Round 2
9112/2015
2.9
55
1000
15.i
53.2
14900
4500
OW-308D
WG
Round 1
6/25/2015
4.53
6.2
620
-
-
36400
580
OW-308D
WG
Round 2
W 11120151
8.5
6.2
759
34700
690
0W-3100
WG
Round 1
6/23/2015
2.28
-
-
-
-
809
1100
-
1.2
1400
1200
-
OW-310D
WG
Round 2
1 9111120151
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, strontlum), it is not shown on this table.
Orange Indicates concentration greater than PPBC
Green indicates concentration less than PPBC
pglL = micrograms per liter
SU = standard unit
J- = estimated concentration, biased low
J = laboratory estimated concentration
,1+= 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 = nephelomethc 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
Ng1L
0.2
1MAC
Vanadium
T
Ug1L
0-3
1MAC
Aal Dissolved Safi
N
Ng1L
500000
02L
Sulfate
N
NgIL
250000
02L
PPBC (Minimum (for rangesy):
PPBC:
-
0.2
1
-
260000
-
31000
Well
Matrix
Event
Hate
Result Flag
Result Flag
Result Flag
Result Fla
AB-10D
WG
Round 1
E12412015
1-5
-
AB-100
WG
Round 2
911112015
0.63
J
1320000
-
-
AB-10S
PW
Round 1
612612015
0.54
3
-
-
AB-10S
PW
Round 2
9/1112015
0.31
3.3
-
AB-10SL
PW
Round 1
6IM2015
14.6
-
AB-10SL
IPW
Round 2
9111/2015
0.44
30.7
AB-15S
PW
Round 1
6122/2015
3.4
254
-
-
AB-258R
WG
Round 1
612612015
-
5.5
AB-25BR
WG
Round 2
9/1112015
1-7
-
AB-250
WG
Round 1
612W2015
0.69
J
AB-25D
WG
Round 2
9112/2015
0.64
J
-
AB-25S
PW
Round 1
6126/2015
13.3
-
AB-25S
PW
Round 2
9/11/2015
1.5
689
AB-308R
WG
Round 1
6124/2015
0.91
ij
A13_308 R
WG
Round 2
911012015
0.67
J
-
AB-30D
W G
Round 1
6124)2015
0.86
J
AB-300
WG
Round 2
911112015
1-1
AB-30S
WG
Round 1
6129/2015
-
-
AB-30S
WG
Round 2
9/1012015
18.3
AB-35BR
WG
Round 1
612512015
1.8
-
AB-35BR
WG
Round 2
9110/2015
11
J
905000
J
AB-50
W G
Round 1
611812015
0.77
J
-
-
AB-50
WG
Round 2
9/912015
AB-5S
PW
Round 1
6119/2015
0.69
0.62
J
-
AB-5S
PW
Round 2
9/9/2015
1.6
33.7
AS-1010
WG
Round 1
6181W015
-
15.3
-
AS-100
WG
Round 2
918/2015
30.6
AS-12S
WG
Round 1
6/912015
1.1
-
AS- 12S
WG
Round 1
619/2015
_
AS-12S
WG
Round 2
918/2015
0.52
J
-
AS-21D
WG
Round 1
6117/2015
1.6
-
-
AS-21)
WG
Round 2
913/2015
-
1.4
-
-
-
AS-40
WG
Round 1
6/512015
4.8
-
AS-40
WG
Round 2
91W2015
AS-61)
WG
Round 1
6/8/2015
0.69
J-'
-
AS-60
WG
Round 2
9/8/2015
0.4
J
-
AS-8BR
WG
Round 1
619/2015
2.7
-
AS-88R
WG
Round 2
915/2015
-
-
-
AS-8D
WG
Round 1
612/2015
1.8B
J
-
AS-81)
WG
Round 2
919/2015
-
F-
BG-11)
WG
Round 3
11116/2015
45.8
6G-1 D
WG
Round 4
12/1512015
43
-
BG-5D
WG
Round 1
6123/2015
-
-
BG-5D
WG
Round 2
91912015
0.46
J
-
-
BG-51)
WG
Round 3
11/1612015
-
-
BG-50
WG
Round 4
12/15/2015
-
-
-
-
-
BG-5S
WG
Round 1
6/2412015
2.6
SG-5S
WG
Round 2
9/912015
0.82
J
BG-5S
WG
Round 3
1111612015
0.31
J
-
BG-5S
WG
Round 4
1205f2015
-
GWA-10D
WG
Round 1
614/2015
0.256
3.36
-
GWA-101)
WG
Round 1
6/26/2015
-
-
-
-
GWA-10D
WG
Round 2
91BY2015
1.3
GWA-110
WG
Round 1
6/512015
1.2
J+
GWA-11D
WG
Round 2
9/312015
0-45
J
-
GWA-115
WG
Round 1
6110/2015
0.52
J
-
GWA-11S
WG
Round 2
9/312015
Oka
J
-
GWA-12D
WG
Round 1
6/4/2015
5.65
-
-
GWA-120
WG
Round 2
9/912015
3.7
-
-
GWA-12D
WG
Round 3
1111912C15
-
3.1
-
-
-
GWA-12D
WG
Round 4
121M2015
2.3
-
GWA-12S
WG
Round 1
6/412015
-
-
-
-
GWA-12S
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
J
GWA-14D
WG
Round 2
91912015
0.62
J
-
GWA-14S
WG
Round 2
9/912015
0.48
J
GWA-150
WG
Round 1
613022015
1.5
-
705000
-
307000
GWA-1513
WG
Round 2
1 911DY2015
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
Ng1L
0.2
IMAC
Vanadium
T
Ug1L
0-3
IMAC
AM Dissolved Soli
N
Ng1L
500000
02L
Suitate
N
Ng1L
250000
02L
PPBC (Minimum (tor ranges)):
PPBC:
-
0.2
1
-
260000
-
31000
Well
Matrix
Event
Date
Result Flag
Result Flag,
Result Flag
Result Fla
GWA-1D
WG
Round 1
6111/2015
0.79
J
-
-
GWA-1D
WG
Round 2
9/8/2015
0.45
J
-
GWA-1S
WG
Round 1
6117/2015
1.5
-
-
GWA-1S
WG
Round 2
9191W015
0.39
J
-
GWA-2D
WG
Round 1
6/10/2015
0.57
J
-
-
GWA-20
1WG
Round 2
9/5/2015
0.65
J
GWA-2S
WG
Round 1
6111/2015
1.3
-
-
GWA-2S
WG
Round 2
9/4/2015
-
-
4.1
-
GWA-31)
WG
Round 1
6/412015
-
GWA-3D
WG
Round 2
9/4/2015
0.6
J
-
GWA-3S
WG
Round 1
61412015
GWA-3S
WG
Round 2
9I412015
0.56
J
-
GWA-41)
WG
Round 1
6123/2015
1.5
GWA-4D
WG
Round 2
9/912015
-
0.53
J
-
-
-
GWA-4S
WG
Round 1
60912015
0.6
1i
GWA-4S
WG
Round 2
911012015
4.3
-
GWA-5BR
WG
Round 1
6116/2015
0.49
J
873000
416000
GWA-5BR
WG
Round 2
9/9/2015
-
-
799000
362000
GW'A-6D
WG
Round 1
612912015
-
-
GWA-6D
WG
Round 2
9/11/2015
-
-
-
GWA-6S
WG
Round 1
6/30/2015
6.5
-
-
GWA-6S
WG
Round 2
9/1212015
1.1
-
-
-
GWA-7D
WG
Round 1
6/1612015
-
GWA-7D
WG
Round 2
9AW2015
-
-
-
GWA-7S
WG
Round 1
611912015
0.38
J
GWA-7S
WG
Round 2
9110/2015
-
-
-
GW'A-8D
WG
Round 1
615/2015
5.2
690000
J-
368000
-
GWA-813
WG
Round 2
WW2015
1.3
726000
346000
-
GWA-8S
WG
Round 1
6118/2015
U.45
J
-
GWA-9D
WG
Round 1
611512015
1.8
-
GWA-91)
WG
Round 2
9/9/2015
-
GWA-9D
WG
Round 3
11116/2015
0.38
J
-
-
GWA-91)
WG
Round 4
12/1512015
0.39
J
-
GWA-9S
WG
Round 1
611912016
5.1
-
-
-
GWA-9S
WG
Round 2
91912015
0.59
J
-
-
GWA-9S
WG
Round 3
1111612015
0.65
J
GWA-9S
WG
Round 4
12/15/2015
-
0.74
J
-
MW-10
1WG
Round 2
9111/2015
-
-
MW-101)
WG
Round 1
6124/2015
-
MW-10D
WG
Round 2
911112015
-
MW-11
WG
Round 1
6/29/2015
2.6
-
MW-11
WG
Round 2
911112015
0.58
J
-
-
MW-11D
WG
Round 1
612912015
-
-
MW-11D
WG
Round 2
9111/2015
0.51
J
-
-
MW-12
WG
Round 1
612W2015
2.6
-
MW-12
1WG
Round 2
919/2015
-
-
MW-12❑
WG
Round i
6120/2015
1.4
MW-12D
WG
Round 2
919/2015
-
-
MW-20D
WG
Round 1
6/24/2015
0.41
J
-
MW-20S
WG
Round 1
6/2412015
-
-
-
MW-21D
WG
Round 1
6123/2015
-
639000
274000
MW-21 D
WG
Round 2
9/1012015
-
0.72
J
599000
-
269000
-
MW-21S
WG
Round 1
6124/2015
1.5
MW-213
IWG
Round 2
911W2015
0.76
J
MW-22BR
WG
Round 1
612512015
0.33
J
-
-
MW-22BR
WG
Round 2
9111/2015
1.2
-
MW-22S
WG
Round 1
6/2512015
0.74
J
-
MW-23BR
WG
Round 1
6/112015
0.55
1,38
-
MW-23BR
WG
Round 2
9/10/2015
-
MW-23BR
WG
Round 4
12/1512015
-
0.31
IJ
-
-
-
MW-23❑
WG
Round 1
61M2015
-
-
-
MW-23D
1VVG
Round 4
12/15/2015
1.2
-
-
-
MW-301BR
WG
Round i
6MV2015
1-8
MW-301BR
WG
Round 2
914/2015
0.81
J
-
MW-303BR
WG
Round 1
611212015
3.7
MW-303SR
WG
Round 2
9/412016
2
-
MW-306BR
WG
I Round 1
6112120151
1.6
530000
IOW-306SR
WG
I Round 2
9/4)20151
1.6
778000
J+
346000
-
MW-308BR
WG
I Round 1
1 6115120151
0.84
1 J
1 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
pg/L
0.2
IMAC
Vanadium
T
pg1L
0-3
IMAC
AM Dissolved Soli
N
pgfL
500000
02L
Sulfate
N
pg1L
250000
02L
PPBC (Minimum (for rangesf):
PPBC:
-
0.2
1
-
260000
-
31000
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Fla
MW-308DR
WG
Round 2
9/9/2015
-
1300000
586000
-
MW-3106R
WG
Round 1
61IW2015
2.5
-
-
MW-310BR
WG
Round 2
919I2015
3.7
-
MW-311BR
WG
Round 1
612912015
0.89
1
-
MW-311BR
WG
Round 2
9111/2015
0.62
J
-
MW-314BR
1WG
Round 1
6/25/2015
1.3
-
MW-314BR
WG
Round 2
9/11)2015
0.02
J
-
MW-315BR
WG
Round 1
6119/2015
1 1A
I-
MW-315BR
WG
Round 2
918/2015
5.5
MW-31TBR
WG
Round 1
61512015
8.4
-
-
MW-317BR
WG
Round 2
91812015
5.9
MW-3180
WG
Round 1
6/2/2015
0.654
J
-
MW-318D
WG
Round 2
91912015
_
MW-9
WG
Found 1
613U12015
2.3
-
-
-
-
-
MW-9D
WG
Round 1
6/24/2015
11.1
MW-90
WG
Round 2
9111/2015
23
-
-
-
OW-303D
WG
Round 2
9112/2015
0.56
36.5
OW-30813
WG
Round 1
1 6125/2015
-
-
-
OW-308D
WG
Round 2
9/11/2015
-
-
OW-3100
WG
Round 1
6/2312015
1.2
-
OW-3100
WG
Round 2
1 MW20151
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
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
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
5/2712015
9111/2015
9IM2015
9/1412015
911412015
9114/2015
9114/2015
9/14/2015
5/2712015
N
N
N
N
N
N
N
N
N
SW-1
DR-SW-1-NS-3015
DR-SW-10-NS-3015
DR-SW-10-WS-3Q15
DR-SW-11-NS-3Q15
DR-SW-12-NS-3015
DR-SW-I3-NS-30
DR-SW-13-NS-3015
SW-3
Constituent
CAS RN'
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Aluminum
7429-90-5
D
IL
43
100 U
100 U
100 U
10D U
100 U
12
Aluminum
7429-90-5
T
87
pIL
613
100 U
330
140
69 J
79 J
27600
Antimony
7440-36-0
D
IL
1.02
1.1
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Antimony
7440-36-0
T
640
pgIL
1.21
0.97
0.16 J
0.6 U
0.5 U
0-5 U
1 U
Arsenic
7440-38-2
D
150
pgIL
13.8
31.8
40.4
1.7
1.6
0.93
42.7
Arsenic
7440-38-2
T
10
u IL
15.5
37.9
49.4
2.1
1.8
1
63.7
Barium
7440-39-3
D
IL
20
110
34
27
26
23
42
Barium
7440-39-3
T
-
200000
IL
18
120
38
30
30
23
267
Beryllium
7440-41-7
D
6.5
pgIL
1 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1 'U
Beryllium
744041-7
T
IL
1 U
02 U
0.2 U
0.2 U
0.2 U
0.2 U
1.16
Boron
7440-42-8
D
pgIL
180
180
170
120
89
65
128
Boron
744042-8
T
-
-
jjgIL
157
190
160
130
100
62
107
Cadmium
7440-43-9
D
0.15
I&L
1 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
Cadmium
744043-9
T
-
IL
1 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
1 U
Calcium
7440-70-2
T
pqIL
19700
20800
2270D
20000
20400
19300
20000
Chromium
744047-3
D
11
jjgIL
1 U
0.25 J
0.26 J
0.2 J
0.2 J
0.34 J
1 U
Chromium
7440-47-3
T
pqIL
1 U
0.26 J
0.37 J
0.24 J
0.24 J
0.49 J
33.6
Cobalt
7440-48-4
D
-
pgIL
1 U
0.5 U
0.46 J
0.52
0.59
0.45 J
1 U
Cobalt
7440-48-4
T
4
IL
1 U
0.22 J
0.88
D.65
0.9
0,54
15.5
Copper
7440-50-8
D
2.7
pqIL
3.39 J+
0.52 J
2.8
8.7 J
10.7
2.4
1 UJ
Copper
7440-50-8
T
IL
4.75
0.3 J
0.63 J
0.54 J
0.61 J
0.65 J
27.3
Iron
7439-89-6
D
pgIL
21
50 U
50 U
50 U
50 U
50 U
40
Iron
7439-89-6
T
WgIL
323
220
630
310
240
240
42400
Lead
7439-92-1
D
0.54
p IL
1 U
022
0.26
0.85 J _
1.3
0.19
1 U
Lead
7439-92-1
T
wgIL
1 U
0.06 J
0.36
0.15
0.14
0.098 J
20.1
Magnesium
7439-95-4
T
jjgIL
7240
6680
6680
6390
6610
6370
5850
Manganese
7439-96-5
D
wqIL
16
59
400
250
270
150
584
Manganese
7439-96-5
T
-
IL
9
140
520
280
430
160
1820
Mercu
7439-97-6
T
0.012
IL
0.0011 J+
0.00778
0.00125
0.000988
0.000792
0.000671
0.00385 J+
Methane
74-82-8
N
IL
10 UJ
15
39.1
26.8
45.9
31.4
20 UJ
Molybdenum
7439-98-7
D
IL
9.11
10.8
9.1
5.7
4.1
2.7
2.56
Molybdenum
7439-98-7
T
2000
IL
9.36
9.7
8.6
6
4.5
2.7
9.85
Nickel
7440-02-0
D
16
IL
1.2
1.6
0.65
0.76
0.75
0.47 J
1 U
Nickel
7440-02-0
T
-
IL
2.5
1.6
0,72
0.62
0.63
0.53
15.9
Potassium
7440-09-7
T
IL
3090
5540
3620 J
2800 J
2660 J
5000 U
3710
Selenium
7782-49-2
D
-
pgIL
2.32
1.9
0.5 U
0.5 U
0.5 U
0-5 U
1 U
Selenium
7782-49-2
T
5
pgIL
2.87
2
0.5 U
0.5 U
0.5 U
0.5 U
1 U
Sodium
7440-23-5
T
IL
11500
8890
13300
12700
11900
11100
10800
Strontium
7440-24-6
D
IL
322
290
310
240
220
210
264
Strontium
7440-24-6
T
-
40000
pgIL
320
300
300
250
250
200
302
Thallium
7440-28-0
D
IL
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
IL
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
IL
4.94
2.4
1 U
1 U
1 U
1 U
1.25
Vanadium
7440-62-2
T
IL
6.65
2.5
0.98 J
0.8 J
0.85 J
0.57 J
54.1
Zinc
7440-66-6
D
36
pgIL
34 J+
10 U
8.7 J
1 D U
10 U
12
5 UJ
Zinc
7440-66-6
T
-
wqIL
212
10 U
10 U
10 U
10 U
10 U
93
Total Dissolved Solids
TDS
N
pgIL
140000
136000
144000
135000
127000
124000
120000
Total Organic Carbon
TOC
N
IL
3800
4500
1100
1200
15400
1600
2200
Total Suspended Solids
TSS
N
IL
16000
3500
16000
2800
3500
2600 U
680000
Alkalinity, CO3
ALK-CO3
N
-
P91L
11000
5000 U
5000 U
5000 U
5000 U
5000 U
10000 U
Alkalinity, HCO3
ALK-HCO3
N
IL
23000
45400
85400
81900
72000
72800
51000
Alkalinity, lab
ALK-LAB
N
-
pgIL
37000
45400
85400 J-
81900 J-
72000 J-
72800 J-
51000
Chloride
16887-00-6
N
230000
IL
11000
8900
11600
11600
11500
11600
11000
Nitrite as N
14797-65-0
N
-
wqIL
29
-
-
-
-
-
76
Nitrogen, NO2 plus NO3
NO2-NO3
N
IL
47
28 J
32
25
Sulfate
14808-79-8
N
pgIL
53000
40200
20100
18100
14700
12900
23000
Sulfide
18496-25-8
N
IL
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
pgIL
-
-
47.4
-
1.51 J
1.83
0.658
-
-
Chromium
7440-47-3
T
IL
0.474 J
1 J
0.69 J
0.386 J
Iron
7439-89-6
T
kjqIL
155 J
216 J
199 J
195 J
Manganese
7439-96-5
D
WgIL
434 J
232 J
266 J
141 J
Manganese
7439-96-5
T
_
IL
-
425 J
277 J
291 J
156 J
As III
7784-46-5
T
WgIL
19.7
0.841 J
0.971
0.516
As V
10103-60-3
T
Il-
-
27.7
0.668 J
0.857
0.5 U
Chromium I
18540-29-9
T
IL
0.012 J
0.018 J
0.016 J
0.019 J
Fe II
1345-25-1
T
IL
-
30 UJ
11.4 J
30 UJ
16.1 J
Fe III
1309-37-1
T
pgIL
Mn II
134443-0
T
jjgIL
-
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 Namelll
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
5/2712015
9111/2015
9IM2015
9/1412015
911412015
9114/2015
9114/2015
9/14/2015
5/2712015
N
N
N
N
N
N
N
N
N
SW-1
DR-SW-1-NS-3015
DR-SW-10-NS-3015
DR-SW-10-WS-3Q15
DR-SW-11-NS-3Q15
DR-SW-I2-NS-3015
DR-SW-I3-NS-30
DR-SW-13-NS-3415
SW-3
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Mn IV
1313-13-9
T
IL
Se IV
10102-18-8
T
pg1L
-
2 U
-
2 U
2 U
2 U
Se(VI)
13410-01-0
T
IL
2 U
2 U
2 U
2 U
Dissolved Oxygen
DO
N
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 Conductivit field
SC
N
Sicm
219.1
200:9
-
Oxidation Reduction Potential
ORP
N
mV
125.7
148.8
Notes:
pglL = micrograms per liter
pSlcm = microsiemens per centimeter
ft = feet
mglL = milligrams per liter
mV = millivolts
NTU - nephelometrio turbidity units
pCVL = 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
❑ = dissolved
Deg C = degree Celsius
❑HHS = 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
$W-4
SW4
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
611812015
9111/2015
5127/20/5
6/18/2015
9/1112015
5/27/2015
611812015
9/1112015
613012015
N
N
N
N
N
N
N
N
N
SW-3
DR-SW-3-NS-3015
SW-4
SW-4
DR-SW-4-NS-3Q15
SW-5
SW-5
DR-SW-5-NS-3015
SW-6
Constituent
CAS RN'
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Aluminum
7429-90-5
D
IL
100 J
5 U
100 U
5 U
100 U
Aluminum
7429-90-5
T
87
pIL
250
127
63 J
90
100 U
-
Antimon
7440-36-0
D
IL
0.5 J
1 U
0.5 U
1 U
0.41 J
0.17 J
Antimony
7440-36-0
T
640
pgIL
-
0.5 U
1 U
0.6 U
1 U
0.45 J
0.16 J
Arsenic
7440-38-2
D
150
pgIL
1.7
1 U
0.29 J
1 U
0.42 J
0.17 J
Arsenic
7440-38-2
T
10
u IL
2
1 U
0.14 J
1 U
0.48 J
0,24 J
Barium
7440-39-3
D
IL
27
18
20
24
17
19
Barium
7440-39-3
T
-
200000
IL
-
34
18
22
25
18
25
Beryllium
7440-41-7
D
6.5
pgIL
0.2 U
1 U
0.2 U
1 U
0.2 U
0.2 U
Beryllium
744041-7
T
IL
-
0.2 U
1 U
0.2 U
1 U
0.2 U
02 U
Boron
7440-42-8
D
pgIL
120
50 U
35 J
58
74
150
Boron
744042-8
T
-
-
jjgIL
120
50 U
29 J
57
72
160
Cadmium
7440-43-9
D
0.15
uaIL
0.08 U
1 U
0.08 U
1 U
0.08 U
0.08 U
Cadmium
744043-9
T
-
IL
0.08 U
1 U
0.08 U
1 U
0.08 U
0.08 U
Calcium
7440-70-2
T
pqIL
20800
14000
19500
13800
10700
6300
Chromium
744047-3
D
11
IL
-
0.21 J
1 U
024 J
1 U
0.25 J
0.49 J
Chromium
7440-47-3
T
IL
0.64
1 U
0.3 J
1 U
0.63
0.67
Cobalt
7440-48-4
D
-
IL
0.45 J
1 U
0.6 U
1 U
0.16 J
0.15 J
Cobalt
7440-48-4
T
4
IL
0,87
1 U
0.18 J
1 U
0.21 J
0.48 J
Copper
7440-50-8
D
2.7
p IL
8.6
7.38 J+
8.1
1 U
4.6
2.2
Copper
7440-50-8
T
IL
0.83 J
1 U
0.71 J
4.62 J+
1.2 J+
1.6
Iron
7439-89-6
D
pgIL
-
30 J
33
26 J
68
30 J
-
Iron
7439-89-6
T
WgIL
580
339
170
412
290
Lead
7439-92-1
D
0.54
p IL
1.1
1 U
1
1 U
0.38
0.2
Lead
7439-92-1
T
wgIL
0.37
1 U
0.087 J
1 U
0.14
0.88
Magnesium
7439-954
T
jjgIL
-
6160
4390
5940
5500
4110
2560
Manganese
7439-96-5
D
PqIL
210
90
23
315
89
22
Manganese
7439-96-5
T
-
IL
-
300
93
46
290
98
83
Mercu
7439-97-6
T
0.012
IL
0.0019 J+
0.000978 J+
0.00202 J+
0.0012 J+
0.00222 J+
0.00334 J+
Methane
74-82-8
N
IL
26.1
10 UJ
6.1 J+
10 UJ
47 J
9.9 J+
Molybdenum
7439-98-7
D
IL
5.9
1 U
0.49 J
1 U
0.61
0.39 J
Molybdenum
7439-98-7
T
2000
IL
5.3
1 U
0.46 J
1 U
0.59
0.26 J
Nickel
7440-02-0
D
16
IL
0.76
1 U
0.48 J
1 U
0.36 J
0.78
Nickel
7440-02-0
T
-
IL
-
0.96
1 U
0.36 J
1 U
OA5 J+
0.67
Potassium
7440-09-7
T
IL
2810 J
1410
500 U
2230
2510 J
5000 U
Selenium
7782-49-2
D
-
pgIL
-
0.5 U
1 U
0.5 U
1 U
0-5 U
0.5 U
Selenium
7782-49-2
T
5
pgIL
0.5 U
1 U
0.5 U
1 U
0.5 U
0.5 U
Sodium
7440-23-5
T
IL
13000
8640
10600
9210
7210
4010 J
Strontium
7440-24-6
D
IL
260
143
210
134
97
42
Strontium
7440-24-6
T
-
40000
pgIL
270
151
200
143
100
45
Thallium
7440-28-0
D
IL
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
IL
-
0.1 U
0.2 U
0.1 U
0.2 U
0.1 UJ
0.1 U
Vanadium
7440-62-2
D
IL
0.78 J
0.3 U
0.55 J
0.3 U
0.5 J
1.2
Vanadium
7440-62-2
T
IL
-
1.1
0.567
1 U
0.42
0.33 J
2.8
Zinc
7440-66-6
D
36
pgIL
10 U
17 J+
10 U
5 UJ
10 U
4.7 J
Zinc
7440-66-6
T
-
wqIL
10 U
5 U
10 U
5 U
10 U
5 J+
Total Dissolved Solids
TDS
N
pgIL
149000
97000
126000
110000
83000
72000
Total Organic Carbon
TOC
N
IL
-
1600
1500
2200
2700
4000
3300
Total Suspended Solids
TSS
N
IL
13100
5000 U
3900
5000 J
2500 U
24700
Alkalinity, CO3
ALK-CO3
N
-
P91L
-
5000 U
10000 U
5000 U
10000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
IL
69600
52000
67100
50DOO
34700
17600
Alkalinity, lab
ALK-LAB
N
IL
-
69600
52000
67100
50000
34700
17600
Chloride
16887-DO-6
N
230DOO
IL
12900
10000
13900
13000
9400
9400
Nitrite as N
14797-65-0
N
-
wqIL
-
145
-
300
-
-
Nitro en, NO2 plus NO3
NO2-NO3
N
IL
110 J-
260
Sulfate
14808-79-8
N
-
pgIL
15300
5900
5500
10000
6900
5100
Sulfide
18496-25-8
N
IL
10O U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
pgIL
-
-
-
-
-
-
-
Chromium
7440-47-3
T
IL
Iron
7439-89-6
T
pgIL
-
Manganese
7439-96-5
D
wgIL
Manganese
7439-96-5
T
_
IL
-
-
-
-
-
As III
7784-46-5
T
WgIL
11
0.054
0.144
As V
10103-60-3
T
IL
15.6
0.083
-
0.208
Chromium I
18540-29-9
T
IL
0.019
0.029
0.017
Fe II
1345-25-1
T
IL
27.9
9.3
-
30-2
Fe III
1309-37-1
T
IL
51.5 J+
11.7 J+
28.1 J+
Mn II
1344�3 0
T
IL
242 J-
4$.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
$W-4
SW4
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
611812015
9111/2015
5127/20/5
6/18/2015
9/1112015
5/27/2015
611812015
9/1112015
613012015
N
N
N
N
N
N
N
N
N
SW-3
DR-SW-3-NS-3015
SW-4
SW-4
DR-SW-4-NS-3Q75
SW-5
SW-5
DR-SW-5-NS-3015
SW-6
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Mn IV
1313-13-9
T
IL
15.3
8.9
12.1
Se IV
10102-18-8
T
pg1L
0.5 U
0.5 U
-
0.5 U
Se(VI)
13410-01-0
T
IL
0.5 U
0.5 U
0.5 U
Dissolved Oxygen
DO
N
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 Conductivit field
SC
N
Sicm
215.9
194.1
128
50.2
Oxidation Reduction Potential
1 ORP
N
mV
111.8
158.7
1
143.8
157.8
Notes:
pg1L = micrograms per liter
pS1cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometrEc turbidity units
pCVL = 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 (s
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
❑ = dissolved
Deg C = degree Celsius
❑HHS = 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
911012015
613012015
9110/2015
6130/2015
9/1012015
512712015
9111/2015
N
N
N
N
N
N
N
DR-SW-6-NS-3015
SW-7
DR-SW-7.NS-3015
SW-8
DR-SW-$-NS-3Q15
SW-9
DR-SW-9-NS-3015
Criteria Min
02B Class C
(range
Surface Water
Constituent
CAS RN'
Fraction
only)
Criteria
Unit
Aluminum
7429-90-5
D
IL
100 U
100 U
100 U
5 U
100 U
Aluminum
7429-90-5
T
87
pgIL
380
-
550
-
320
129
360
Antimony
7440-36-0
D
pqIL
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
IL
0.6 U
0.22 J
0.5 U
0.5 U
0.6 U
1 U
0.72
Arsenic
7440-38-2
D
150
pgIL
0.21 J
0.14 J
0.21 J
0.14 J
0.33 J
46.3
59
Arsenic
7440-38-2
T
10
P91L
0.37 J
0.24 J
0.35 J
022 J
0.2 J
51.1
75.9
Barium
7440-39-3
D
IL
20
18
20
19
20
88
92
Barium
7440-39-3
T
-
200000
kjqtL
26
29
25
24
24
99
120
Beryllium
7440-41-7
D
6.5
IL
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
1 U
0.2 U
Beryllium
744041-7
T
-
pgIL
02 U
0.2 U
0.2 U
0.2 U
0.2 U
1 U
0.111
Boron
7440-42-8
D
jigIL
220
130
190
170
130
360
380
Boron
744042-8
T
-
P91L
240
130
180
180
160
364
400
Cadmium
7440-43-9
D
0.15
WgIL
0.08 U
0.08 U
0,08 U
0.08 U
0.08 U
1 U
0.08 U
Cadmium
744043-9
T
PgIL
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
744047-3
D
11
pgIL
0.3 J+
0�24 J
0.24 J+
0.46 J
0.84 J+
1 U
0.45 J
Chromium
7440-47-3
T
iluaVIL
0.87
0.68
0.9
0.59
0.41 J
1 U
1
Cobalt
7440-48-4
D
-
pgIL
0.6 U
0.5'U
0.13 J
0.5 U
0.43 J
1 U
0.5 U
Cobalt
7440-48-4
T
4
IL
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
pgIL
12 J+
2
2.8 J+
2.8
1.6 J+
1 U
0.23 J
Copper
7440-50-8
T
IL
1.4 J+
1.8
1.5 J+
1.3
3 J+
5.11 J+
1.7
Iron
7439-89-6
D
pgIL
140
-
41 J
-
29 J
IOU
50 U
Iron
7439-89-6
T
pgIL
1000
1200
800
140
550
Lead
7439-92-1
D
0.54
lj IL
0.26 J+
0.088 J
0.21 J+
0.061 J
0.62 J+
1 U
0.1 U
Lead
7439-92-1
T
-
IL
0.73
0.97
0.77
0.64
0.2 J+
1 U
0.83
Magnesium
7439-95-4
T
IL
3380
2480
3310
2580
3280
13500
14300
Manganese
7439-96-5
D
pqIL
52
16
50
15
63
35
5 U
Manganese
7439-96-5
T
IL
83
98
81
55
94
154
230
Mercu
7439-97-6
T
0.012
pqIL
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
IL
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
UaIL
0.65
0.26 J
0.56
026 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
IL
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
-
pgIL
0.5 U
0.5 U
0.5 U
0.5 U
0.6 U
1 U
0.36 J
Selenium
7782-49-2
T
5
pgIL
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
-
vgIL
6230
4260 J
6900
3900 J
7560
17000
18700
Strontium
7440-24-6
D
IL
57
41
54
43
53
883
1000
Strontium
7440-24-6
T
-
40000
PgIL
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
jjgIL
0.022 J
0.1 U
0.025 J
0.1 U
0.1 U
0.2 U
0.036 J
Vanadium
7440-62-2
D
IL
1
0.85 J
0.96 J
0.69 J
2.6
0.701
1.1
Vanadium
7440-62-2
T
IL
3
3.1
3.1
2.5
1
0:947
2.7
Zinc
7440-66-6
D
36
pqIL
10 UJ
10 U
13 J+
10 U
13 J+
18 J+
10 U
Zinc
7440-66-6
T
-
IL
10 U
20 J+
10 U
4.6 J+
61
10
16
Total Dissolved Solids
TDS
N
pqIL
71000
74000
63000
73000 J
68000
270000
290000
Total Organic Carbon
TOC
N
pgIL
2400
3500
2600
5900
2400
2100
1600
Total Suspended Solids
TSS
N
pqIL
16100
24500
17100
19200
13300
32000
35200
Alkalinity, CO3
ALK-CO3
N
-
pgIL
6000 U
5000 U
5000 U
5000 U
5000 U
10000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
IL
22500
16800
24200
18300
23200
100000
114000
Alkalinity, lab
ALK-LAB
N
-
IL
22500
16800
24200
18300
23200
100000
114000
Chloride
16887-00-6
N
230000
IL
13000
9400
12100
9800
11600
13000
14500
Nitrite as N
14797-65-0
N
-
IL
-
-
-
-
-
132
-
Nitro en, NO2 plus NO3
NO2-NO3
N
L
380
310
460
270
650
210 J-
Sulfate
14808-79-8
N
-
PqIL
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
pgIL
-
-
-
-
-
-
-
Chromium
7440-47-3
T
L
Iron
7439-89-6
T
L
-
-
Manganese
7439-96-5
D
wCJIL
Manganese
7439-96-5
T
IL
-
-
-
As III
7784-46-5
T
pqIL
As V
10103-60-3
T
IL
-
-
Chromium I
18540-29-9
T
pqIL
Fe II
1345-25-1
T
pgIL
-
-
Fe III
1309-37-1
T
ILL
1344�30
T
-
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
911012015
613012015
9110/2015
6130/2015
9/1012015
512712015
9111/2015
N
N
N
N
N
N
N
DR-SW-6-NS-3015
SW-7
DR-SW-7.NS-3015
SW-8
DR-SW-$-NS-3Q15
SW-9
DR-SW-9-NS-3015
Constituent
CAS RN
Fraction
Criteria Min
(range
only)
02B Class C
Surface Water
Criteria
Unit
Mn IV
1313-13-9
T
IL
Se IV
10102-18-8
T
pg1L
-
-
Se(VI)
13410-01-0
T
I
ua/L
Dissolved Oxygen
DO
N
mc#L
-
7.68
T95
619
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 Conductivity field
Sc
NVS/cm
1
1 49
120.1
502
123.1
453.9
Oxidation Reduction Potential
ORP
N
mV
1
1 199.9
157.3
203.7
193.8
90.3
Notes:
pg1L = micrograms per liter
pS1cm = micros iemens per centimeter
It = feet
mg1L = milligrams per liter
mV = millivolts
NTU - nephelometrio turbidity units
pCVL = 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 (s
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
❑ = dissolved
Deg C = degree Celsius
❑HHS = 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 NamellD:
S-1
S-1
S-1
S-2
S-3
S.6
Round 1
Round 1
Round 2
Round 2
Round 2
Round 3
512712015
612612015
9/12/2015
9/14/2015
9/14/2015
1112412015
N
N
N
N
N
N
S-1
S-1
DR-S.1-NS-3015
DR-S-2-NS-3015
DR-S-3-NS-3015
DR-S-E-NS-4Q15-1
Constituent
CAS RN
Fraction
Criteria Min
(range
(range
only)
NCDE002L
GWQS, MI
DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
IL
5 U
10O U
100 U
100 U
100 U
Aluminum
7429-90-5
T
pgIL
3410
4300
280
640
120
Antimony
7440-36-0
D
-
IL
1 U
0.34 J
0.5 U
0.25 J
0.5 U
Antimony
7440-36-0
T
1
IMAC
pgIL
1 U
0.45 J
0.5 U
0.26 J
0.5 U
Arsenic
7440-38-2
D
-
p IL
1 U
7.5
0.5 lJ
1.7
207
Arsenic
7440-38-2
T
10
02L
p IL
1.68
14.1
0.16 J
2.3
204 J+
Barium
7440-39-3
D
-
p IL
20
50
40
55
50
Barium
7440-39-3
T
700
02L
jjqIL
54
160
42
62
53
Be lium
7440-41-7
D
-
wqIL
1 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
pqIL
1 U
1.1
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
-
p IL
50 U
290
220
260
280
Boron
7440-42-8
T
700
02L
pqIL
50 U
240
210
260
300
Cadmium
7440-43-9
D
IL
1 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
pgIL
1 U
0.085
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
IL
14400
25200 J-
16900
21000
29800
Chromium
7440-47-3
❑
-
pqIL
1 U
0.22 J+
0.21 J
0.39 J
0.25 J+
Chromium
7440-47-3
T
10
02L
IL
3.86
17.6
0.28 J
0.42 J
0.81 J+
Cobalt
7440-48-4
D
IL
1 U
3.1 J+
0.37 J
1.1
0.7
Cobalt
7440-48-4
T
1
IMAC
p IL
4.88
17.5
0.5 J
1.9
0.88
Copper
7440-50-8
❑
-
pgIL
5.62
1.4 J+
1 U
1 A
1 U
Copper
7440-50-8
T
1000
02L
IL
6.15 J+
13.4 J+
0.24 J
0.43 J
0.41 J
Iron
7439-89-6
D
IL
18
190
50 U
36 J
140
Iron
7439-89-6
T
300
02L
p IL
5720
7700
390
970
330
Lead
7439-92-1
D
IL
1 U
0.16 J+
0.052 J
0.11
0.051 J+
Lead
7439-92-1
T
15
02L
p IL
3.97
16.2
0.28
0.71
0.25
Magnesium
7439-954
T
IL
4500
8430
5260
5860
6690
Manganese
7439-96-5
D
p IL
107
640
87
350
1100
Manganese
7439-96-5
T
50
02L
p IL
829
940
89
380
1100
Mercury
7439-97-6
T
1
02L
IL
0.0005 UJ
0.00845
0.00154
0.00583
0.00231 J+
Methane
74-82-8
N
-
pq1L
1 10 UJ
219
16.6
143
161 J
Molybdenum
7439-98-7
❑
P91L
1.25
18.9
0.33 J
15.2
21.1
Molybdenum
7439-98-7
T
pqIL
1.57
12.3
0.31 J
13.6
18.8
Nickel
7440-02-0
D
IL
1 U
1 J+
0.36 J
0.81
0.64
Nickel
7440-02-0
T
100
02L
pqIL
3.3
10.6 J+
0.39 J
0.86
0.91 J+
Potassium
7440-09-7
T
-
p IL
1590
4120 J
4800 J
5270
5820
Selenium
7782-49-2
D
IL
1 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
pgIL
1 U
2.1
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
IL
9070
16900
13800
15400
15100
Strontium
7440-24-6
❑
IL
157
330
240
300
460
Strontium
7440-24-6
T
PqIL
166
380
240
300
470
Thallium
7440-28-0
D
-
p IL
0.2 J
0.1 J
0.022 J
0.1 J
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
pqIL
0.2 U
0.16
0.031 J
0.044 J
0.028 J+
Vanadium
7440-62-2
D
IL
0.3 U
1.6
1 U
0.3 J
0.35 J
Vanadium
7440-62-2
T
0.3
IMAC
p IL
8.06
41.8
0.52 J
1.7
0.89 J
Zinc
7440-66-6
D
-
wqIL
11 J+
13 J+
6.7 J
10
10 u
Zinc
7440-66-6
T
1000
021-
pqIL
17
26
6.6 J
10 U
10 U
Total Dissolved Solids
TDS
N
500000
02L
p IL
99000
154000
128000
127000
158000
Total Organic Carbon
TOC
N
IL
2100
6700
900 J
650 J
670 J+
Total Suspended Solids
TSS
N
11-
180000
4360000
3700
44000
24700
Alkalinity. CO3
ALK-CO3
N
pgIL
10000 LI
5000 UJ
5000 U
5000 U
5000 t1
Alkalinity, HCO3
ALK-HCO3
N
JqIL
51000
72500
39300
56700
107000
Alkalinity, lab
ALK-LAB
N
-
IL
51000
72500
39300 J-
56700 J-
107000
Chloride
16887-00-6
N
250000
02L
IL
10000
11800
11700
11700
10700
Nitrite as N
14797-65-0
N
1000
02L
IL
117
-
Nitro en, NO2 plus NO3
NO2-NO3
N
IL
-
20'U
28
34
140
Sulfate
14808-79-8
N
250000
02L
ppIL
9400
32600
34600
29100
18100
Sulfide
18496-25-8
N
IL
200 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
p IL
-
-
0.275 J
1.17 J-
214
Chromium
7440-47-3
T
10
02L
IL
0.56 J
1.36 J
1.32
Iron
7439-89-6
T
300
02L
p IL
212 J
237 J
1520 J
Manganese
7439-96-5
D
IL
-
83.3 J
381 J
1120
Manganese
7439-96-5
T
50
02L
p IL
-
77.4 J
380 J
2100 J
As(III)
7784-46-5
T
-
IL
0.402
0.156 J
0.889
146
As V
10103-60-3
T
IL
0.195
0.5 U
0.279 J
67.5
Chromium (VI)
18540-29-9
T
0.07
DHHS
p IL
0.022 J+
0.011 J
0.0092 J
0.016 J-
Fe II
1345-25-1
T
IL
20 U
32.5 J
27.8 J
166 J
Fe Ili
1309-37-1
T
IL
29.9
-
-
-
Mn II
1344-43-0
T
IL
229
IV
1313-13-9
T
1 UJMn
-
-
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 NamellD:
S-1
S-1
S-1
S-2
S-3
S-6
Round 1
Round 1
Round 2
Round 2
Round 2
Round 3
512712015
612612015
9/12/2015
9/14/2015
9/14/2015
1112412015
N
N
N
N
N
N
S-1
S-1
DR-S-I-NS-3015
DR-S-2-NS-3015
DR-S-3-NS-3015
DR-S-E-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
IL
0.5 lJ
2 U
2 U
2 U
Se Vl)
13410-01-0
T
1L
0.5 U
-
2 U
2 U
2 U
Dissolved Oxygen
DO
N
m iL
7,02
2.3
4.71
7.02
-
Temperature
TEMP
N
-
Deg C
24.9
17.1
17.3
17.1
H
PH
N
6.5
8.5
02L
SU
7,65
7.5
6.89
7.1
-
ITurbidity, field
TURB
N
NTU
5,17
19.74
71
45.89
S ecific Conductiv�it field
SC
N
Slcm
173.8
255.7
18
207.8
-
Oxidation Reduction Potential
ORP
N
1 208.6
1 127.9
112
139.3
Notes:
pg1L = micrograms per liter
pSfcm = microsiemens per centimeter
It = feet
mg1L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCVL. = 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
028 = 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
TOG = 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
CCSWO02OUT
DRRC001
DRRC001
Round 1
Round 1
Round 2
Round 1
Round 2
71112015
7/112015
911412015
711/2015
911412015
FD
N
N
N
N
CCSWOUI-DUP
CCSW001
DR-CCSW002OUT-NS-3Q1
DRRC001
DR-DRRC001-NS-3Q15
Constituent
CAS RN
Fraction
SWQS Criteria
NCDEQ 02S
GWQS Criteria.
NCDEQ 02L
Unit
Aluminum
7429-90-5
D
-
-
wit.
-
100 U
100 U
Aluminum
7429-90-5
T
-
87
-
-
IL
-
3500
-
2300
Antimony
7440-36-0
D
-
-
-
-
/L
0.3 J
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
-
640
-
1
1L
0,24 J
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
D
-
150
-
-
1L
0.42 J
0.16 J
0.32 J
0.38 J
Arsenic
7440-38-2
T
-
10
-
10
1L
0.35 J
0.58
0.35 J
1.9
Barium
7440-39-3
D
-
-
-
-
1L
-
27
72
50
46
Barium
7440-39-3
T
-
200000
700
1L
-
33
120
53
86
Beryllium
7440-41-7
D
-
6.5
-
1L
-
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
-
-
4
fL
-
0.2 U
0.21
0.2 U
0.25
Boron
7440-42-8
D
-
-
-
-
1L
-
50 U
39 J
130
160
Boron
7440-42-8
T
-
-
700
1L
-
28 J+
38 J
130 J+
160
Cadmium
7440-43-9
D
-
0.15
-
1L
-
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
-
-
-
2
1L
-
0.08 U
0.08 U
0.08 U
0.05 J
Calcium
7440-70-2
1 T
-
-
-
1L
-
14700
30800
19000
19800
Chromium
7440-47-3
D
11
-
1L
-
0.44 J
0.33 J
0.32 J
0.2 J
Chromium
7440-47-3
T
-
-
10
1L
-
0.22 J
2
0.25 J
0.93
Cobalt
7440-48-4
D
-
-
-
/L
-
0.32 J
0.31 J
1.4
0.63
Cobalt
7440-484
T
4
-
1
/L
-
0.34 J
4.6
1.5
3.6
Copper
7440-50-8
D
2.7
-
-
1L
-
0.88 J
7.5
0.45 J
7.3
Copper
7440-50-8
T
-
-
1000
IL
-
0.95 J
3.8
0.49 J
2.4
Iron
7439-89-6
D
-
-
-
1L
-
-
50 U
-
100
Iron
7439-89-6
T
-
-
300
1L
-
-
5200
-
9900
Lead
7439-92-1
D
0.54
-
-
/L
-
0.12
0.78
0.1 U
0.76
Lead
7439-92-1
T
-
15
1L
-
0.09 J
1.6
0.092 J
2.5
Magnesium
7439-95-4
T
-
-
1L
-
2210
11700
12200
13300
Manganese
7439-96-5
D
-
-
IL
-
83
250
2100
1000
Manganese
7439-96-5
T
-
50
1L
-
160
1400
2200
1500
Mercury
7439-97-6
T
0.012
1
1L
-
0.000623
0.011
0,000684
0.0425
Methane
74-82-8
N
-
-
IL
-
8 J+
2.6 J+
23.7
30.5
Molybdenum
7439-98-7
D
-
-
-
1L
-
1.5
0.47 J
0.36 J
0.33 J
Molybdenum
7439-98-7
T
2000
-
1L
-
1.4
0.5 U
OX J
0.15 J
Nickel
7440-02-0
D
16
-
1L
-
0.54
1
1.7
1.3
Nickel
7440-02-0
T
-
100
1L
-
0.7
3.7
1.9
2.6
Potassium
7440-09-7
T
-
-
1L
-
4750 J
12200
5000 U
5000 U
Selenium
7782-49-2
❑
-
-
1L
-
0.85
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
5
20
1L
-
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
-
-
-
1L
-
11100
12200
19400
21000
Strontium
7440-24-6
❑
-
-
-
1L
-
65
160
240
230
Strontium
7440-24-6
T
-
40000
-
1L
-
68
170
250
270
Thallium
7440-28-0
D
-
-
-
1L
-
0.091 J
0.1 U
0.1 U
0.1 U
Thallium
7440-28-0
T
-
0.47
0.2
1L
-
0.025 J
0.1 U
0.036 J
0.026 J
Vanadium
7440-62-2
D
-
-
-
1L
-
0.56 J
0.49 J
1 U
1 U
Vanadium
7440-62-2
T
-
0.3
1L
-
d.55 J
3.3
0.29 J
2.6
Zinc
7440-66-6
D
36
-
1L
-
10 U
5.3 J
6.8 J
5 J
Zinc
7440-66-6
T
-
-
1000
IL
-
10 U
33
5 J
36
Total Dissolved Solids
TDS
N
-
-
500000
fL
-
112000
177000
186000
185000
Total Organic Carbon
TOC
N
-
-
-
1L
-
6000
2500
12500
2700
Total Suspended Solids
TSS
N
-
-
-
1L
-
4200 U
183000
2500 U
363000
Alkalinity, CO3
ALK-0O3
N
-
-
-
1L
-
5000 U
5000 U
5000 U
5000 UJ
Alkalinity, HCO3
ALK-HCO3
N
-
-
-
1L
-
22300
117000
70900
82000
Alkalinity, lab
ALK-LAB
N
-
-
-
1L
-
22300
117000
70900
82000
Chloride
16887-00-61
N
230000
-
250000
1L
-
16400
7000
12600
14000
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
-
-
-
wq1L
-
22
300
170
110
Sulfate
14808-79-8
N
-
-
-
250000
1L
-
22900
15400
38400
46000
Sulfide
18496-25-8
N
-
-
-
1L
-
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
-
10
1L
-
-
0.5 U
-
0.203 J
Chromium
7440-47-3
T
-
-
10
/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 NameIID:
CCSW001
CCSW001
CCSWO02OUT
DRRC001
DRRC001
Round 1
Round 1
Round 2
Round 1
Round 2
7/1/2015
7/1/2015
911412015
71112015
911412015
FD
N
N
N
N
CCSW001-DUP
CCSW001
DR-CCSW0020UT-NS-3Q1 5
DRRC001
DR-DRRC001 -NS-3Q1 5
Constituent
CAS RN
Fraction
SWQS Criteria
NCDEQ 02B
GWQS Criteria
NCDEQ 02L
Unit
Iron
7439-89-6
T
-
300
IL
-
-
266 J+
2210 J
Manganese
7439-96-5
D
-
-
IL
-
-
249 J
1100 J
Manganese
7439-96-5
T
-
-
50
IL
-
-
417 J
-
1220 J
As III
7784-46-5
T
-
-
-
IL
0.2 U
0.2 U
0.5 U
0.24
0.325 J+
As V
10103-60-3
T
-
-
IL
0.2 U
0.2 U
0.5 U
0.2 U
0.5 U
Chromium VI
18540-29-9
T
-
-
0.07
IL
0.041
0.056
0.14
0.05 UJ
0.0093 J
Fe II
1345-25-1
T
-
-
-
IL
23 J
7 J
30 UJ
213
25.5 J+
Fe III
1309-37-1
T
-
-
-
/L
74.9 J
103 J
-
253
-
Mn II
1344-43-0
T
-
-
IL
62.9
71.1
-
2470
-
Mn IV
1313-13-9
T
-
-
-
/L
62.1 J
49.5 J
-
0.74
-
Se IV
10102-18-8
T
-
-
-
-
IL
0.5 U
0.5 U
2 U
0.5 U
2 U
Se VI
13410-01-0
T
-
-
-
IL
0.5 U
0.5 U
2 U
0.5 U
2 U
Dissolved Oxygen
DO
N
-
-
m 1L
-
4.65
7A
3.89
5.12
Temperature
TEMP
N
-
-
-
-
Deg C
-
29.7
18.5
23
18.6
H
PH
N
6
1 9
6.5
8.5
SU
-
8.05
7.5
7.2
7.4
Turbidity, field
TURB
N
-
-
-
-
NTU
-
5A7
130.2
4.21
115.E
Specific Conductivity field
Sc
N
-
-
S/=
-
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
pSlcm = microsiemens per centimeter
It = feet
mV = millivolts
NTU - nephelometric turbidity units
pCi1L = 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