NC0038377_Table 12-1 Ash Pore Water Risk Screening_20150902

TABLE 12-1
RISK SCREENING TABLE: COAL ASH PORE WATER DATA
MAYO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ROXBORO, NC
Chromium
Water
Spec
Ferrous
Aluminum
Antimony
Arsenic
Barium
Beryllium
Bi-
Boron
Cadmium
Calcium
Carbonate
(III)/Chro
Cobalt
Copper
Analytical Parameter
Redox Assignment
pH
Level
Temp
Cond
DO
ORP
Eh
Turbidity
Iron
Alkalinity
carbonate
Alkalinity
Chloride
mium (VI)
Alkalinity
DIS
TOT
DIS
TOT
DIS
TOT
DIS
TOT
DIS
TOT
DIS
TOT
DIS
TOT
TOT
DIS
TOT
DIS
TOT
DIS
TOT
Reporting Units
P 9
None
S.U.
ft
De C
9
umhos
cm
m /I
9
mV
mV
NTU
m /I
9
m /I
9
u /I
9
ug/I
u /I
9
ug/I
ug/I
ug/I
ug/I
u /I
9
u /I
9
ug/I
m /1
9
u /I
9
u /I
9
1
ug/I
ug/I
m /I
9
m /I
9
m /I
9
u /I
9
ug/I
u /I
9
ug/I
m /1
9
m /1
9
SSA NCAC 02L Standard
NE
6.5-8.5
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
1*
NE
1 10
1 NE
700
NE
4*
NE
NE
700
NE
2
NE
NE
250
NE
10
NE
1*
NE
1
Sample ID
Sample
Field Parameters
Analytical Results
Collection Date
ASH PORE WATER
ABMW-01
06/25/2015
Mixed (anoxic)
7.6
5.65
27
1009
0.32
-159
46
3.58
0.5
450
146
179
43
38
369
SIB
850
925
<1
<1
450
4530
4560
<1
<1
100
<10
16
<1
<1
5.55
6.09
0.0106
<0.001
ABMW-02(')
06/17/2015
Mixed (oxic-anoxic)
7.8
10.96
27
684
0.6
-187.1
17.9
2
<0.5
290
23
61
<1
<1
874
1020
149
173
1.22
1.42
290
8100
9200
<1
<1
82.2
<10
12
<1
<1
<1
<1
<0.001
<0.001
ABMW-03(')
06/17/2015
Anoxic
6.63
17.15
23
527
0.2
-136
69
2.13
3
80
18
119
<1
<1
197
193
200
200
<1
<1
80
1960
1940
<1
<1
54.5
<10
76
<1
<1
<1
<1
<0.001
<0.001
ABMW-04(1)
06/22/2015
Mixed (oxic-anoxic)
7.5
5.96
25.1
818
0.6
238
443
1.35
0.5
370
21
71
<1
<1
496
499
449
448
<1
<1
370
5040
4930
<1
<1
120
<10
11
<1
<1
1.43
1.49
<0.001
<0.001
DETECTIONS/SAMPLES
---
---
---
---
---
---
---
---
---
---
4/4
4/4
4/4
1/4
1/4
4/4
4/4
4/4
4/4
1/4
1/4
4/4
4/4
4/4
0/4
0/4
4/4
0/4
4/4
0/4
0/4
2/4
2/4
1/4
0/4
AVERAGE ASH PORE WATER
CONCENTRATION (DETECTIONS
---
---
---
---
---
---
---
---
---
---
298
52
108
43
38
484
558
412
437
1.22
1.42
298
4,908
5,158
---
---
89.2
---
29
---
---
3.49
3.79
0.0106
---
ONLY)
MAXIMUM ASH PORE WATER
GROUNDWATER CONCENTRATION
---
---
---
---
---
---
---
---
---
450
146
179
43
38
874
1,020
850
925
1.22
1.42
450
8,100
9,200
---
---
120.0
---
76
---
-
5.55
6.09
0.0106
NUMBER OF ASH PORE WATER
SAMPLES EXCEEDING 15A NCAC 2L
---
---
---
---
---
---
---
---
---
---
0
0
0
0
1
0
4
0
1
0
0
0
0
4
0
0
0
0
0
0
0
0
2
0
0
STANDARD
Notes:
0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013.
ORP = Oxidation Reduction Potential mV = millivolts
DIS = Dissolved
NE = Not established
TOT = Total
NTU = nephelometric turbidity unit
Temp = Temperature
S.U. = Standard Unit
DO = Dissolved Oxygen
ug/I = microgram per liter
Deg C = Degree Celsius
umhos/cm = micro mhos per centimeter
mg/I = milligrams per liter
Spec Cord = Specific Conductance
mg-N/L = miligram nitrogen per liter
ft = feet
--- = Not applicable
< = concentration not detected at or above the reporting limit.
* - Interim Maximum Allowable Concentrations (IMACs) of the
15A NCAC 02L Standard, Appendix 1, April, 1, 2013.
Note 1: Hexavalent Chromium concentration is less than EPA screening
value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional
Screening Levels [RSLs] rev., June 26. 2015).
Prepared by: VTV/SRW Checked by: RLP
P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Repo rting\Tables\Draft Tab les\Table 12-1 Ash Pore Water Risk Screen ing.xlsx page 1 of 2

TABLE 12-1
RISK SCREENING TABLE: COAL ASH PORE WATER DATA
MAYO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ROXBORO, NC
Iron
Lead
Magnesium
Manganese
Mercury
Molybdenum
Nickel
Nitrate
Potassium
Selenium
Sodium
Strontium
Thallium
Total
Total
Total
Vanadium
Zinc
Analytical Parameter
Methane
(as N)
Sulfate
Sulfide
Dissolved
Organic
Suspended
Solids
Carbon
Solids
DIS
TOT
DIS
TOT
TOT
DIS
TOT
DIS
TOT
DIS
TOT
DIS
TOT
TOT
DIS
TOT
TOT
DIS
TOT
DIS
TOT
DIS
TOT
DIS
TOT
Reporting Units
ug/I
ug/I
ug/l
ug/I
mg/I
ug/l
ug/I
1
ug/I
ug/l
ug/I
ug/I
ug/I
ug/I
ug/I
mg-N/L
mg/I
ug/I
ug/I
mg/I
mg/I
mg/l
mg/I
mg/l
ug/I
ug/l
mg/I
mg/I
mg/l
ug/I
ug/l
mg/I
mg/l
SSA NCAC 02L Standard
NE
300
1 NE
15
NE
NE
50
1 NE
1 1
1 NE
NE
NE
I NE
100
10
NE
NE
20
NE
NE
NE
250
NE
NE
0.2*
500
NE
NE
NE
0.3*
NE
1
Sample ID
Sample
Analytical Results
Collection Date
ASH PORE WATER
ABMW-01
06/25/2015
483
1370
<1
<1
51.9
2120
2280
<0.05
<0.05
<10
205
213
4.77
5.45
<0.01
24.6
<1
<1
18.7
3.36
3.49
5.8
<0.1
2.13
2.47
540
2.8
6
290
314
0.014
<0.005
ABMW-02('�
06/17/2015
172
356
<1
<1
27
957
1110
<0.05
<0.05
3100
1620
1830
<1
1.12
0.103
15.2
<1
<1
13.4
1.54
1.78
36
<0.1
<0.2
<0.2
450
11
<5
2.59
3.53
<0.005
<0.005
ABMW-03('�
06/17/2015
3870
3890
<1
<1
11.9
451
451
<0.05
<0.05
4400
75.1
75.6
3.16
2.69
0.016
10.2
<1
<1
10.8
1.17
1.17
42
<0.1
<0.2
0.289
350
4.1
9
<0.3
0.68
<0.005
<0.005
ABMW-04(')
06/22/2015
724
940
<1
<1
32.8
657
641
<0.05
<0.05
4600
434
428
1.12
1.71
<0.01
22.1
<1
<1
12.5
2.3
2.25
38
<0.1
<0.2
<0.2
520
2.9
<5
2.44
2.84
0.013
<0.005
DETECTIONS/SAMPLES
4/4
4/4
0/4
0/4
4/4
4/4
4/4
0/4
0/4
3/4
4/4
4/4
3/4
4/4
2/4
4/4
0/4
0/4
4/4
4/4
4/4
4/4
0/4
1/4
2/4
4/4
4/4
2/4
3/4
4/4
2/4
0/4
AVERAGE ASH PORE WATER
CONCENTRATION (DETECTIONS
1,312
1,639
---
---
30.9
1,046
1,121
---
---
4,033
584
637
3.02
2.74
0.060
18.0
---
---
13.9
2.09
2.17
30
---
2.13
1.38
465
5.2
8
98.34
80.26
0.0135
---
ONLY)
MAXIMUM ASH PORE WATER
GROUNDWATER CONCENTRATION
3,870
3,890
---
---
51.9
2,120
2,280
---
---
4,600
1,620
1,830
4.77
5.45
0.103
24.6
---
---
18.7
3.36
3.49
42
---
2.13
2.47
540
11.0
9
290
314
0.014
NUMBER OF ASH PORE WATER
SAMPLES EXCEEDING 15A NCAC 2L
0
4
0
0
0
0
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
2
0
0
0
4
0
0
STANDARD
Notes:
0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013.
ORP = Oxidation Reduction Potential mV = millivolts
DIS = Dissolved
NE = Not established
TOT = Total
NTU = nephelometric turbidity unit
Temp = Temperature
S.U. = Standard Unit
DO = Dissolved Oxygen
ug/I = microgram per liter
Deg C = Degree Celsius
umhos/cm = micro mhos per centimeter
mg/I = milligrams per liter
Spec Cond = Specific Conductance
mg-N/L = miligram nitrogen per liter
ft = feet
--- = Not applicable
< = concentration not detected at or above the reporting limit.
* - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013.
Note 1: Hexavalent Chromium concentration is less than EPA screening
value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional
Screening Levels [RSLs] rev., June 26. 2015).
Prepared by: VTV/SRW Checked by: RLP
P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Repo rting\Tables\Draft Tab les\Table 12-1 Ash Pore Water Risk Screen ing.xlsx page 2 of 2