NC0024406_04_BCSS CAP Update 2019_Tables_20191231

Corrective Action Plan Update December 2019
Belews Creek Steam Station
TABLES
(CAP Content Section 9)
SynTerra

Corrective Action Plan Update December 2019
Belews Creek Steam Station SynTerra
Table ES-1
Summary of BCSS Assessment
Documentation
Included in Executive Summary text

Corrective Action Plan Update December 2019
Belews Creek Steam Station SynTerra
Table ES-2
Summary of BCSS Assessment Activities
Included in Executive Summary text

Corrective Action Plan Update December 2019
Belews Creek Steam Station SynTerra
Table ES-3
Components of Source Control, Active
Remediation, and Monitoring
Included in Executive Summary text

TABLE 3-1
SUMMARY OF ONSITE FACILITIES
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Evaluated
as Source
Facility
Area in
CSA
Operational
Source Material
Area or
Rationale For Evaluation
Name
CAP
Schedule
Status
Capacity
Update
Coal Ash/NPDES
Ash Basin
Yes
NA
Inactive
Permitted waste
17,676,000 cy
CAMA regulated unit
streams
Pine Hall Road
Yes
NA
Closed
Fly ash
8,500,000 cy
Hydrologically connected to the
Landfill
ash basin
Former part of the ash basin
Steam station
treatment system and
Chemical Pond
No
NA
Closed
boiler and filter
2.9 acres
hydrologically connected to the
chemical cleaning
ash basin, no evidence of
wastes
groundwater COI migration
from source area
Former part of the ash basin
Constructed
FGD wastewater/
treatment system and
Wetlands
No
NA
Closed
Landfill contact
25 acres
hydrologically connected to the
Treatment
water/sanitary
ash basin, no evidence of
System
wastewater
groundwater COI migration
from source area
Not hydrologically connected to
Structural Fill
No
Mar-20
Closed
Fly ash
968,000 cy
the ash basin and with NCDEQ
DWM regulatory oversight
Craig Road
CCR and
Not hydrologically connected to
Landfill
No
NA
Operational
operational waste
67.1 acres
the ash basin and with NCDEQ
DWM regulatory oversight
FGD Residue
CCR and
Not hydrologically connected to
Landfill
No
NA
Operational
operational waste
24 acres
the ash basin and with NCDEQ
DWM regulatory oversight
Coal Pile
No
Mar-20
Operational
Coal
42 acres
Not hydrologically connected to
the ash basin
umNo
F
Mar-20
Operational
Gypsum
5 acres
Not hydrologically connected to
Pad
the ash basin
Prepared by: ALA Checked by: CDE
Notes:
CSA Schedule - applicable only for units identified in the letter "Final Comprehensive Site Assessment and Corrective Action Plans Approvals for Duke Energy Coal Ash
Facilities" (April 5, 2019)
CAMA - North Carolina Coal Ash Management Act of 2014
CAP - Corrective Action Plan
cy - cubic yards
DWM - Division of Waste Management
NA - not applicable
NCDEQ - North Carolina Department of Environmental Quality
NPDES - National Pollutant Discharge Elimination System
Page 1 of 1

TABLE 4-1
BACKGROUND SOIL SAMPLE SUMMARY
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Soil Boring
Depth Range
(ft bgs)
Number of Sampled Intervals
BG-1D
(1-31)
4
BG-2D
(1-32)
4
BG-3S
(1-22)
3
GWA-3D
(34-35.5)
1
GWA-4S
(45-47)
1
GWA-12D
(10-27)
4
BGSB-01
(1-22)
5
BGSB-02
(1-32)
6
BGSB-03
(1-22)
5
GWASB-12
(5-27)
5
Note:
ft bgs — feet below ground surface
Prepared by: ALA Checked by: CDE
Page 1 of 1

TABLE 4-2
BACKGROUND VALUES FOR SOIL
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Constituent
Reporting
Unit
PSRG Protection
of Groundwater
2018 Background
1
Threshold Value
2019 Updated
Background Threshold
Value 2
Piedmont Background
s
Threshold Value Range
pH*
S.U.
NE
4.3-5.8
4.6-7.0
2.3-9.8
Aluminum
mg/kg
110,000
31,253
28,880
25,978 - 81,619
Antimony
mg/kg
0.9
0.6
0.6
0.177 - 0.9
Arsenic
mg/kg
5.8
13
43
1.2 - 43.13
Barium
mg/kg
580
139
122
122.2 - 1,063
Beryllium
mg/kg
63
19
2.9
1.2 - 4.52
Boron
mg/kg
45
17
35
14.4 - 56.3
Cadmium
mg/kg
3
0.03
0.9
0.03 - 1
Calcium
mg/kg
NE
450
1,000
410 - 8,769
Chloride
mg/kg
938^
14
402
12 - 423
Chromium
mg/kg
3.8
36
47
20 - 440
Cobalt
mg/kg
0.9
51
60
27 - 81.68
Copper
mg/kg
700
28
32
17.4 - 216
Iron
mg/kg
150
40,400
61,967
24,500 - 85,345
Lead
mg/kg
270
40
52
7.5 - 95.23
Magnesium
mg/kg
NE
3,600
4,492
760 - 51,829
Manganese
mg/kg
65
1,117
1,257
370 - 3,388
Mercury
mg/kg
1
0.1
0.1
0.04 - 0.113
Molybdenum
mg/kg
71
9.8
4
1.83 - 12
Nickel
mg/kg
130
12
21
9.2 - 237
Nitrate (as N)
mg/kg
NE
0.3
0.3
0.25 - 31.2
Nitrate
mg/kg
NE
---
40.3
40.3 - 48.8
Potassium
mg/kg
NE
2,114
3,458
427 - 35,600
Selenium
mg/kg
2.1
5
5
1.58 - 6.857
Sodium
mg/kg
NE
393
393
338 - 1,500
Strontium
mg/kg
1,500
9
7
7.1 - 200
Sulfate
mg/kg
1,438^
12
403
12 - 437
Thallium
mg/kg
0.28
0.7
0.8
0.166 - 2.132
Total Organic Carbon
mg/kg
NE
---
4,070
742 - 4,960
Vanadium
mg/kg
350
114
231
42 - 230.9
Zinc
mg/kg
1,200
52
71
60.5 - 325.5
Prepared by: JHG Checked by: ALA
Notes:
2018 Background values approved by NCDEQ on May 14, 2018.
^ - PSRG Protection of Groundwater value was calculated using the equation shown in Section 6
* - Upper and lower threshold values calculated for parameter
' - Background threshold values were calculated using data from background unsaturated soil samples collected June 2015 to April 2017.
2 - Updated background threshold values were calculated using data from background unsaturated soil samples collected June 2015 to April 2017. The background threshold value
updates retained extreme outlier concentrations in background unsaturated soil datasets (SynTerra, 2019).
3 - Piedmont background threshold value ranges include the Duke Energy calculated 20174 and 20195 background threshold values from 10 Duke Energy facilities located in the Piedmont
physiographic region (Allen Steam Stations, Belews Creek Steam Stations, Buck Steam Station4, Cape Fear Steam Electric Plant4, Cliffside Steam Stations, Dan River Steam Station4, Marshall
Steam Stations, Mayo Steam Electric Plants, Riverbend Steam Station4, and Roxboro Steam Electric Plants).
--- - 2017 background threshold value was not calculated for constituent.
mg/kg - milligrams per kilogram
NE - Not Established
S.U. - Standard Unit
PSRG - Preliminary Soil Remediation Goal
Page 1 of 1

TABLE 4-3
BACKGROUND VALUES FOR GROUNDWATER
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Constituent
Reporting
Unit
1SA NCAC
02L
Standard
2018
Background Threshold Values'
2019 Updated
Background Threshold ValueS2
Piedmont
Background
Threshold Value
Range3
Shallow
Flow Zone
Deep
Flow Zone
Bedrock
Flow Zone
Shallow
Flow Zone
Deep
Flow Zone
Bedrock
Flow Zone
pH
S.U.
6.5-8.5
5.1-6.0
5.2-7.0
6.3-6.5
5.2-6.0
5.6-7.0
6.2-8.4
3.6-9
Alkalinity
mg-CaCO3/L
NE
23
64
81
20
53
91
19 - 379
Aluminum
Ng/L
NE
860
140
100
805
204
120
100 - 1,238
Antimony
Ng/L
1*
1
1
1
1
1
1
0.5 - 2.9
Arsenic
Ng/L
10
1
1
1
1
1
2
0.2 - 6.35
Barium
Ng/L
700
58
13
6
123
16
11
10.52 - 840
Beryllium
Ng/L
4*
0.4
0.2
0.2
0.3
0.1
0.2
0.0625 - 1
Bicarbonate
mg-CaCO3/L
NE
22
63
78
24
54
91
19 - 388
Boron
Ng/L
700
50
50
50
50
50
50
50 - 176.8
Cadmium
Ng/L
2
1
1
0.08
1
0.08
0.08
0.08- 1
Calcium
mg/L
NE
4
13
10
8
14
26
4 - 111
Carbonate
mg-CaCO3/L
NE
5
5
5
5
5
5
5- 10
Chloride
mg/L
250
15
21
3
19
19
3
3.34 - 250
Chromium
Ng/L
10
5
3
5
11
3
11
1-26
Chromium (VI)
Ng/L
NE
2
0.4
0.3
4
0.6
0.4
0.03 - 12
Cobalt
Ng/L
1*
0.5
2
0.8
0.6
2
0.8
0.088 - 88.85
Copper
Ng/L
1000
3
5
10
2
5
17
0.5 - 17.15
Fluoride
mg/L
2
---
---
---
0.1
0.1
0.6
0.1 - 1.8
Iron
Ng/L
300
750
240
228
1,600
226
341
56.3 - 37,500
Lead
Ng/L
15
1
1
0.1
1
0.6
0.2
0-2
Lithium
Ng/L
NE
---
---
---
2
95
30
2 - 95.39
Magnesium
mg/L
NE
3
7
3
4
7
4
1- 45
Manganese
Ng/L
50
23
13
10
40
57
64
7-9,170
Mercury
Ng/L
1
0.2
0.2
0.2
0.2
0.2
0.2
0.05 - 0.5
Methane
Ng/L
NE
3
3
10
3
10
10
1 - 2,505
Molybdenum
Ng/L
NE
1
1
4
0.5
2
6
0.5 - 26.2
Nickel
Ng/L
100
4
5
3
8
5
7
0.87 - 48
Nitrate + Nitrite
mg-N/L
NE
4
4
0.2
3
4
0.2
0.02 - 6.3
Potassium
mg/L
NE
5
5
5
5
19
5
1.609 - 18.8
Selenium
Ng/L
20
0.5
0.5
0.5
1
0.5
0.5
0.5 - 2.4
Sodium
mg/L
NE
6
11
12
7
11
15
6- 190
Strontium
Ng/L
NE
57
69
100
46
73
99
27 - 2,120
Sulfate
mg/L
250
2
6
10
2
8
15
1.2 - 510
Sulfide
mg/L
NE
0.1
0.1
0.1
0.1
0.1
0.1
0.1 - 2
TDS
mg/L
500
85
148
133
93
134
181
50- 1,200
Thallium
Ng/L
0.2*
0.2
0.2
0.1
0.2
0.1
0.1
0.1 - 0.2
TOC
mg/L
NE
1
1
10
3
6
4
1- 12.3
Total Radium
pCi/L
5^
9
1
0.5
2
4
4
0.494 - 35
Total Uranium
pg/mL
0.03^
0.0005
0.0005
0.0005
0.0005
0.0005
0.002
0.0002 - 0.864
Vanadium
Ng/L
0.3*
1
1
1
3
2
2
0.33 - 25.8
Zinc
Ng/L
1000
1 10
1 43
1 16
39
23
41
5- 140
Prepared by: HES Checked by: JHG
Notes: Revised by: DAA
' - Background threshold values were calculated using data from background groundwater samples collected June 2015 to April 2017
2 - Updated background threshold values were calculated using data from background groundwater samples collected October 2010 to December 2018 and submitted
to NCDEO June 2019
3 - Piedmont background threshold value ranges include the Duke Energy calculated 20174 and 20195 background threshold values from 10
Duke Energy facilities located in the Piedmont physiographic region (Allen Steam Stations, Belews Creek Steam Stations, Buck Steam Station°,
Cape Fear Steam Electric Plant°, Cliffside Steam Stations, Dan River Steam Station 4, Marshall Steam Stations, Mayo Steam Electric Plants,
Riverbend Steam Station 4, and Roxboro Steam Electric Plants).
2018 background threshold values approved by North Carolina Department of Environmental Qualtity( NCDEQ) on May 14, 2018
Background threshold values have been rounded to similar levels of precision as 15A North Carolina Administrative Code (NCAC) 02L Standard or Interim Maximum
Allowable Concentration (IMAC).
- 2017 background threshold value was not calculated for constituent.
* - IMAC of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013.
^ - Federal Maximimum Contaminant Level
iig/L - micrograms per liter
iig/mL - micrograms per milliliter
mg/L - milligrams per liter
mg-CaCO3/L - milligrams calcium carbonate per liter
mg-N/L - milligrams nitrogen per liter
NE - not established
pCi/L - picocuries per liter
S.U. - standard units
TDS - total dissolved solids
TOC - total organic carbon
Page 1 of 1

TABLE 4-4
BACKGROUND DATASET RANGES FOR SURFACE WATER
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK NC
Constituent
Reporting
Unit
Comparison Criteria
Belews Reservoir
Background Ranges
Dan River
Background Ranges
Constituents with 15A NCAC
02B (Class C1, Water Supply: WS-IV1, WS-V1)1 Standards
pH
S.U.
6.0-9.0
6.8 - 7.9
6.5 - 7.7
Dissolved Oxygen
mg/L
<_ 4
5.3 - 10.8
4.4 - 8.8
Temperature
deg C
>_ 32
7 - 26.8
9 - 32.9
Turbidity
NTU
Lake and Reservoirs: >_ 25
Streams: >_ 50
5.2 - 137
0.01 - 33.5
Arsenic
pg/L
10
0.15 - 0.27
0.19 - 0.78
Arsenic (Dissolved)
pg/L
acute: 340, chronic: 150
0.15 - <1
0.16 - 0.76
Barium
pg/L
1000
20.8 -51
13.9 - 35.9
Beryllium (Dissolved)
pg/L
acute: 65, chronic: 6.5
<0.1 - <1
0.012 - 0.058
Cadmium (Dissolved )2
pg/L
acute: 0.82, chronic: 0.15
<0.08 - <0.1
<0.08 - 0.22
Chloride
mg/L
230
2.9 -26
5.3 - 8.5
Chromium (III) (Dissol
pg/L
acute: 183, chronic: 24
NA
NA
Chromium (VI) (Dissoly
pg/L
acute: 16, chronic: 11
NA
NA
Copper (Dissolved )2
pg/L
acute: 3.6, chronic: 2.7
0.51 - 1.99
0.72 - 8.7
Fluoride
mg/L
1.8
0.066 - 0.11
0.074 - <1
Lead (Dissolved )2
pg/L
acute: 14, chronic: 0.54
0.061 - <1
0.028 - <1
Mercury
pg/L
chronic: 0.012
0.00078 - 0.00906
0.00004 - 0.0022
Nickel
pg/L
25
0.14 - 2.11
0.19 - 1
Nickel (Dissolved )2
pg/L
acute:140, chronic: 16
0.16 - <1
0.13 - 2.1
Nitrate + Nitrite
mg-N/L
10
0.084 - 0.529
0.0200 - 0.17
Selenium
pg/L
chronic: 5
<0.5 - <1
0.25 - 0.63
Silver (Dissolved )2
pg/L
acute: 0.3, chronic: 0.06
<0.3
<0.3
Sulfate
mg/L
250
2.4 - 13
2.4 - 10.7
Thallium
pg/L
2
<0.1 - <0.2
<0.1 - <0.2
Total Dissolved Solids
mg/L
500
37 - 130
43 - 174
Total Hardness
mg/L
100
12.9 - 36.8
20.3 - 32.9
Zinc (Dissolved )2
pg/L
acute: 36, chronic: 36
<5 - <10
2.8 - 11
Constituents with USEPA National Recommended Water Quality Criteria
Alkalinity
mg/L
chronic: 20
7.6 - 47
16 - 33
Aluminum
pg/L
acute: 620, chronic: 300
81 - 4,170
53 - 1,820
Antimony
pg/L
5.6
<0.5 - <1
0.11 - 0.12
Iron
pg/L
1000
436 - 5,700
27.1 - 1,740
Manganese
pg/L
50
26 - 123
5.1 - 76
Constituents without 02B or USEPA Criteria
Bicarbonate
mg-CaCO3/L
NE
7.6 - 47
16 - 33
Boron
pg/L
NE
<50
25.4 - 72
Cadmium
pg/L
NE
<0.08 - <0.1
<0.08 - <0.1
Calcium
mg/L
NE
2.99 - 8.94
3.4 - 8.11
Carbonate Alkalinity
mg-CaCO3/L
NE
<0.5
<5
Chromium
pg/L
NE
0.27 - 4.5
0.12 - 1.55
Chromium (VI)
pg/L
NE
0.034 - 0.064
0.027 - 0.12
Page 1 of 2

TABLE 4-4
BACKGROUND DATASET RANGES FOR SURFACE WATER
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK NC
Constituent
Reporting
Unit
Comparison Criteria
Belews Reservoir
Background Ranges
Dan River
Background Ranges
Constituents without 02B or USEPA Criteria (Continued)
Cobalt
pg/L
NE
0.1 - 1.79
0.01 - 0.19
Copper
pg/L
NE
0.5 - 3.74
0.3 - 5.5
Lead
pg/L
NE
0.15 - 2.91
0.059 - 0.49
Lithium
pg/L
NE
1.1 - 1.3
0.3 - 0.37
Magnesium
mg/L
NE
1.31 - 3.52
1.8 - 3.67
Methane
pg/L
NE
<10
2.1 - 561
Molybdenum
pg/L
NE
<0.5 - 1.9
1.12 - 1.8
Potassium
mg/L
NE
1.68 - 2.98
1.59 - 3.86
Sodium
mg/L
NE
<0.3
4.09 - 7.38
Strontium
pg/L
NE
22 - 75
23 - 74
Sulfide
mg/L
NE
<0.1
<0.1
Total Organic Carbon
mg/L
NE
1.9 - 5.5
0.57 - 4.9
Total Radium
pCi/L
NE
NA
NA
Total Uranium
pg/mL
NE
NA
NA
Vanadium
pg/L
NE
0.49 - 8.77
0.32 - 3.85
Zinc
pg/L
NE
6 - 14
2.9 - 20.5
Prepared by: DAA Checked by: ALA
Notes:
Background locations, which were part of the evaluation of potential groundwater to surface water impacts, were approved by North Carolina Department of
Environmental
115A NCAC 02B .0101 WS-IV (Water Supply) = Waters protected as water supplies which are generally in moderately to high developed watersheds. Suitable for all
Class C uses. Based on sample location, samples SW-BL-D, SW-BL-GWA-04S/D, SW-BL-S-06, SW-BL-S-07, SW-BL-S-13/14, SW-DR-01, SW-DR-02, SW-DR-03 and
SW-DR-04 are subject to WS-IV water quality standards.
'15A NCAC 02B .0101 WS-V (Water Supply) = Waters protected as water supplies which are generally upstream of and draining to Class WS-IV waters. Suitable
for all Class C uses. Based on sample location, samples SW-DR-BG, SW-DR-BG2, SW-DR-TFC are subject to WS-V water quality standards.
115A NCAC 02B .0101 Class C (Aquatic Life) = Freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival and wildlife;
All freshwaters shall be classified to protect these at a minimum. All samples collected from the Dan River and Belews Reservoir are subject to Class C
z Standard value dependent on hardness. Calculated hardness dependent metal standards represent most conservative value. Standards are calculated using
25 mg/L hardness, regardless if actual instream hardness values are greater than 25 mg/L.
3 Chromium speciation is not performed for trivalent chromium (Cr(III)). Trivalent values are derived by subtracting hexavalent chromium values from
dissolved chromium values. Where a dissolved chromium value is less than the detection limit ("<"), it is considered a whole number for purposes of
deriving a trivalent chromium value.
Acute - "Compliance with acute instream metals standards shall only be evaluated using an average of two or more samples collected with one hour."
Reference 15A NCAC 02B .0211
Chronic - "Compliance with chronic instream metals standards shall only be evaluated using averages of a minimum of four samples taken on consecutive days, or as a
96-hour average" Reference 15A NCAC 02B .0211.
< - Concentration not detected at or above the adjusted reporting limit.
mg/L - milligrams per liter
pg/L - micrograms per liter
pg/mL - micrograms per milliliter
mg-CaCO3/L - milligrams calcium carbonate per liter
mg-N/L - milligram nitrogen per liter
NA - not available
NE - not established
pCi/L - picocuries per liter
S.U. - standard unit
USEPA - Unitesd States Environmental Protection Agency
Page 2 of 2

TABLE 4-5
BACKGROUND DATASET RANGES FOR SEDIMENT
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Constituent
Reporting Unit
PSRG Protection
of Groundwater
Belews Reservoir
Background Dataset
Range
Dan River
Background Dataset
Range
pH
S.U.
NE
5.8 - 6.7
5.1 - 6.3
Aluminum
mg/kg
110,000
3,200 - 28,000
13,000 - 16,000
Antimony
mg/kg
0.9
0.16 - <0.72
<0.64 - <0.83
Arsenic
mg/kg
5.8
0.52 - <6.7
0.76 - 3.6
Barium
mg/kg
580
12 - 82
61 - 92
Beryllium
mg/kg
63
0.22 - 3.5
0.8 - 1.3
Boron
mg/kg
45
<2.9 - <16.8
<3.5 - <4.9
Cadmium
mg/kg
3
0.022 - <0.81
0.034 - 0.091
Calcium
mg/kg
NE
437 - 1,600
480 - 820
Chloride
mg/kg
NE
6- <338
11 - <20
Chromium
mg/kg
3.8
2.2 - 29
16 - 19
Chromium (III)
mg/kg
360,000
2.2
7.7 - 8.5
Cobalt
mg/kg
0.9
<6.7 - 16
7.7 - 8.5
Copper
mg/kg
700
2.3 - 26
8.1 - 11
Iron
mg/kg
150
3,100 - 20,000
13,000 - 15,000
Lead
mg/kg
270
2.3 - 13
9.6 - 13
Magnesium
mg/kg
NE
260 - 4,700
1,800 - 2,500
Manganese
mg/kg
65
20 - 670
130 - 240
Mercury
mg/kg
1
0.0075 - <0.12
<0.13 - <0.16
Molybdenum
mg/kg
7.1
<2.3 - <3.4
<2.8 - <3.9
Nickel
mg/kg
130
1.4 - 16
7.6 - 8.5
Nitrate (as N)
mg/kg
NE
<0.28 - <0.31
0.16 - <0.4
Nitrate
mg/kg
NE
<33.8
NE
Potassium
mg/kg
NE
260 - 2,200
1,200 - 2,300
Selenium
mg/kg
2.1
<6.7 - <30
<11 - <20
Silver
mg/kg
3.4
<0.59 - <0.68
<0.69 - <0.99
Sodium
mg/kg
NE
<290 - <340
47 - <490
Strontium
mg/kg
1500
0.7 - 14
6 - 7.8
Sulfate
mg/kg
1438A
<14 - <338
<16 - 34
Sulfide
mg/kg
NE
<30.2 - <39.4
<36.9 - <42.2
Thallium
mg/kg
0.28
0.05 - 0.28
0.18 - 0.19
Total Organic Carbon
mg/kg
NE
940 - 8,070
5,980 - 12,300
Vanadium
mg/kg
350
14.6 - 80
40 - 42
Zinc
mg/kg
1,200
4.8 - 40
31 - 44
Prepared by: DAA Checked by: ALA
Notes:
Background locations, which were part of the evaluation of potential groundwater to surface water impacts, were approved by North Carolina
Department of Environmental Quality (NCDEQ).
A - PSRG Protection of Groundwater value was calculated using the equation shown in Section 6
mg/kg - milligrams per kilogram
NE - not established
S.U. - standard unit
PSRG - Preliminary Soil Remediation Goals
Page 1 of 1

TABLE 5-1
APRIL 2019 WATER LEVEL MEASUREMENTS AND ELEVATIONS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Well ID
Top of Well
Casing
(ft. NAVD 88)
Top of Screen
Elevation
(ft. NAVD 88)
Bottom of
Screen
Elevation
(ft. NAVD 88)
April 2019
Measured
Water Level'
(ft. BTOC)
April 2019
Water
Elevation
(ft. NAVD 88)
Monitoring Flow
Zone
A13-113R
772.83
675.52
670.5
40.74
732.09
Bedrock
AB-1BRD
769.53
469
459
97.42
672.11
Bedrock
A13-11D
772.47
696.47
691.5
40.44
732.03
Dee
A13-1S
772.42
734.49
719.5
42.21
730.21
Shallow
A13-213R
770.57
605.81
595.8
43.73
726.84
Bedrock
A13-26RD
770.64
501.85
491.9
94.63
676.01
Bedrock
A13-21D
773.84
638.71
633.7
43.01
730.83
Dee
A13-2S
773.94
739.69
724.7
31.59
742.35
Shallow
A13-313R
769.91
506.69
496.7
95.45
674.46
Bedrock
A13-31D
772.51
658.8
653.8
50.60
721.91
Dee
A13-3S
772.62
733.92
718.9
38.23
734.39
Shallow
A13-4 Ash Well
761.29
704.67
694.7
6.35
754.94
Ash Pore Water
AB-4 Lower Ash
761.68
700.48
695.5
6.63
755.05
Ash Pore Water
A13-4 Medium Ash
761.59
725.87
720.87
6.57
755.02
Ash Pore Water
A13-4 Medium Ash 30
761.74
725.07
720.07
6.64
755.1
Ash Pore Water
A13-4 SAP2
761.47
685.69
668.69
6.46
755.01
Shallow
A13-4 Sa rolite Well
NA
NA
NA
6.18
NA
Shallow
A13-4 Upper Ash
761.77
744.86
739.86
6.74
755.03
Ash Pore Water
A13-413R
761.99
621.74
616.74
7.01
754.98
Bedrock
A13-46RD
762.5
601.53
596.53
7.71
754.79
Bedrock
A13-41D
762.21
669.75
664.75
7.19
755.02
Dee
A13-4S
762.18
756.36
741.36
6.41
755.77
Ash Pore Water
AB-4SAP
761.92
674.17
684.17
6.87
755.05
Shallow
AB-4SL
762.25
707.85
697.85
7.11
755.14
Ash Pore Water
A13-51D
762.13
661.94
656.94
7.06
755.07
Dee
A13-5S
761.9
755.86
740.86
6.51
755.39
Ash Pore Water
AB-5SL
761.85
725.01
715.01
6.33
755.52
Ash Pore Water
AB-6D
765.33
677.22
672.22
7.89
757.44
Dee
A13-6S
765.55
760.46
750.46
7.58
757.97
Ash Pore Water
AB-6SL
765.5
749.08
744.08
7.67
757.83
Ash Pore Water
A13-71D
771.14
683.72
678.72
13.31
757.83
Dee
A13-7S
771.09
762.91
752.91
13.79
757.3
Ash Pore Water
A13-81D
765.38
690.1
685.1
8.27
757.11
Dee
A13-8S
765.1
758.16
743.16
7.61
757.49
Ash Pore Water
AB-8SL
765.29
725.04
715.04
8.42
756.87
Ash Pore Water
AB-9BR
782.84
649.84
644.84
23.81
759.03
Bedrock
A13-96RD
783.26
589.2
584.2
23.78
759.48
Bedrock
A13-91D
782.84
689.69
684.69
23.23
759.61
Dee
A13-9S
783.15
766.74
751.74
22.53
760.62
Shallow
BG-1D
808.48
758.63
753.63
40.07
768.41
Dee
BG-IS
808.75
779.08
763.88
40.19
768.56
Shallow
BG-213RA
813.59
713.17
708.17
43.94
769.65
Bedrock
BG-21D
812.13
739.95
734.95
43.78
768.35
Dee
BG-2S
811.8
769.72
754.72
45.84
765.96
Shallow
BG-31D
844.61
779.72
774.72
24.4
820.21
Dee
BG-3S
845.64
817.46
802.46
26.98
818.66
Shallow
CCR-11D
790.11
736.7
721.7
37.32
752.79
Dee
CCR-11S
790.16
747.59
742.59
36.54
753.62
Shallow
CCR-12D
772.3
718.79
713.79
20.54
751.76
Dee
CCR-12DA
776.07
725.1
720.1
21.31
754.76
Dee
CCR-12S
772.24
756.8
741.8
20.69
751.55
Shallow
CCR-13BR
705.36
656.8
646.8
16.78
688.58
Bedrock
CCR-13D
705.61
682.15
677.15
15.73
689.88
Dee
CCR-13S
704.27
694.81
689.81
14.45
689.82
Shallow
CCR-11D
774.44
728.04
723.04
25.17
749.27
Dee
CCR-1S
774.59
746.74
736.74
25.47
749.12
Shallow
CCR-21D
767.4
702.23
697.23
20.3
747.1
Dee
CCR-2S
768.66
750.46
735.46
21.58
747.08
Shallow
CCR-41D
773.96
721.05
716.05
33.08
740.88
Dee
CCR-4S2
773.78
733.55
728.55
BP
NA
Shallow
CCR-51D
727.62
668.14
663.14
20.01
707.61
Dee
CCR-5S
727.12
699.48
684.48
5.04
722.08
Shallow
CCR-6D
658.05
632.49
627.49
14.16
643.89
Dee
CCR-6S3
658.43
1 646.46
1 641.46
1 BP
I NA
I Shallow
CCR-71D
688.88
1 635.43
1 630.43
1 13.76
1 675.12
1 Dee
Page 1 of 3

TABLE 5-1
APRIL 2019 WATER LEVEL MEASUREMENTS AND ELEVATIONS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Well ID
Top of Well
Casing
(ft. NAVD 88)
Top of Screen
Elevation
(ft. NAVD 88)
Bottom of
Screen
Elevation
(ft. NAVD 88)
April 2019
Measured
Water Level'
(ft. BTOC)
April 2019
Water
Elevation
(ft. NAVD 88)
Monitoring Flow
Zone
CCR-7S
688.9
677.76
662.76
12.34
676.56
Shallow
CCR-8AD
773.56
685.46
680.46
38.09
735.47
Dee
CCR-8D
728.18
652.55
647.55
25.32
702.86
Dee
CCR-8S4
727.9
711.06
696.06
BP
NA
Shallow
CCR-9D
773.4
719.34
714.34
33.5
739.9
Dee
CCR-9S
773.1
747.45
732.45
24.62
748.48
Shallow
EX-OB-1
770.96
725.38
715.38
29.11
741.85
Dee
EX-OB-2
762.8
732.77
722.77
16.26
746.54
Dee
GWA-01BR
743.72
631.1
621.1
63.41
680.31
Dee
GWA-01D
743.03
682.9
677.9
20.18
722.85
Dee
GWA-01S
743.08
721.72
706.72
17.29
725.79
Shallow
GWA-02D
787.51
726.58
721.58
39.46
748.05
Dee
GWA-02S
787.58
750.5
735.5
38.96
748.62
Shallow
GWA-03D
769.5
721.68
716.68
40.89
728.61
Dee
GWA-03S
769.14
739.51
724.51
40.54
728.6
Shallow
GWA-06D
793.25
689.93
684.93
37.19
756.06
Dee
GWA-06S
793.37
762.95
747.95
31.07
762.3
Shallow
GWA-07D
822.7
741.39
736.39
34.6
788.1
Dee
GWA-07SA
822.87
792.87
777.87
33.34
789.53
Shallow
GWA-08D
831.15
739.61
734.61
28.47
802.68
Dee
GWA-08S
832.01
808.27
793.27
25.76
806.25
Shallow
GWA-09BR
794.53
675.78
670.78
46.81
747.72
Bedrock
GWA-09D
794.28
708.25
703.25
42.46
751.82
Dee
GWA-09S
793.99
754.77
739.77
39.44
754.55
Shallow
GWA-10DA
749.54
NA
NA
8.02
741.52
Dee
GWA-10S
749.11
742.78
727.78
6.93
742.18
Shallow
GWA-11D
757.04
691.61
686.61
26.21
730.83
Dee
GWA-11S
757.03
731.49
716.49
22.11
734.92
Shallow
GWA-12BR
836.46
727.35
722.35
59.78
776.68
Bedrock
GWA-12D
837.16
771.04
766.04
54.61
782.55
Dee
GWA-12S
835.79
792.65
777.65
53.39
782.4
Shallow
GWA-16BR
783.66
682.03
677.03
36.22
747.44
Bedrock
GWA-16DA
783.78
729.27
724.27
35.74
748.04
Dee
GWA-16S
784.41
752.51
737.51
35.23
749.18
Shallow
GWA-17D
787.37
735.07
730.07
36.11
751.26
Dee
GWA-17S5
787.61
760.07
745.07
BP
NA
Shallow
GWA-18D
774.54
715.34
710.34
26.1
748.44
Dee
GWA-18SA
774.59
760.33
745.33
26.5
748.09
Shallow
GWA-19BR
743.06
661.00
656
23.58
719.48
Bedrock
GWA-19D
743.24
702.19
697.19
13.25
729.99
Dee
GWA-19SA
743.33
735.06
720.06
8.51
734.82
Shallow
GWA-20BR
773.69
689.27
684.27
32.64
741.05
Bedrock
GWA-20D
773.72
715.44
710.44
22.98
750.74
Dee
GWA-20SA
773.53
743.65
728.65
27.57
745.96
Shallow
GWA-21D
734.79
707.07
702.07
13.60
721.19
Dee
GWA-21S
735.01
725.88
715.88
12.77
722.24
Shallow
GWA-22D
735.73
703.23
698.23
8.58
727.15
Dee
GWA-22S
738.1
729.23
719.23
11.54
726.56
Shallow
GWA-23D
811.79
755.19
750.19
22.82
788.97
Dee
GWA-23S
811.57
787.17
772.17
25.17
786.4
Shallow
GWA-24BR
641.78
580
570
23.55
618.23
Bedrock
GWA-24D
642.21
626.11
621.11
13.61
628.6
Dee
GWA-24S
643.21
635.28
630.28
11.38
631.83
Shallow
GWA-25BR
855.76
757.48
752.48
37.77
817.99
Bedrock
GWA-26BR
854.99
768.86
763.86
37.66
817.33
Bedrock
GWA-26D
856.8
791.01
786.01
39.37
817.43
Dee
GWA-26S
856.16
819.87
804.87
38.37
817.79
Shallow
GWA-27BR
758.32
647.46
642.46
30.72
727.6
Bedrock
GWA-27D
758.3
717.73
712.73
13.68
744.62
Dee
GWA-27S
758.42
748.79
733.79
12.3
746.12
Shallow
GWA-30D
738.49
1 703
698
17.52
720.97
Dee
GWA-30S
738.43
1 726.1
711.1
18.24
720.19
Shallow
GWA-31D
715.67
657.8
652.8
4.66
711.01
Dee
GWA-31S
714.26
707.2
692.2
12.87
701.39
Shallow
GWA-32D
706.84
630.4
625.4
21.15
685.69
Dee
Page 2 of 3

TABLE 5-1
APRIL 2019 WATER LEVEL MEASUREMENTS AND ELEVATIONS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Well ID
Top of Well
Casing
(ft. NAVD 88)
Top of Screen
Elevation
(ft. NAVD 88)
Bottom of
Screen
Elevation
(ft. NAVD 88)
April 2019
Measured
Water Level'
(ft. BTOC)
April 2019
Water
Elevation
(ft. NAVD 88)
Monitoring Flow
Zone
GWA-32S
707.68
691.3
676.3
18
689.68
Shallow
LRB-113R
809.07
712.21
707.21
55.21
753.86
Bedrock
LRB-ID
809.16
730.32
725.32
54.52
754.64
Dee
LRB-IS
809.12
760.34
745.34
53.6
755.52
Shallow
LRB-213R
804.28
721.6
716.6
40.93
763.35
Bedrock
LRB-21D
804.32
736.54
731.54
40.47
763.85
Dee
LRB-2S
804.20
761.83
746.83
39.27
764.93
Shallow
MW-1
852.69
815.49
805.49
31.45
821.24
Shallow
MW-104BR
798.56
652.2
647.2
38.7
759.86
Bedrock
MW-104BRA
798.96
654.35
634.35
39.24
759.72
Bedrock
MW-104D
798.34
717.81
712.81
38.54
759.8
Dee
MW-104S
798.68
760.49
750.49
40.06
758.62
Shallow
MW-11D
854.15
768.62
763.62
41
813.15
Bedrock
MW-2
858.05
818.05
808.05
45.42
812.63
Shallow
MW-200BR6
636.42
588.7
583.7
0
NA
Bedrock
MW-200D
636.05
618.8
613.8
5.54
630.51
Dee
MW-200S
635.89
631.18
623.18
4.25
631.64
Shallow
MW-201BR
783.77
683.37
678.37
35.92
747.85
Bedrock
MW-201D
783.98
747.12
737.12
35.33
748.65
Dee
MW-202BR
789.63
688.87
683.87
38.2
751.43
Bedrock
MW-202D
790.78
701.47
696.47
39.73
751.05
Dee
MW-202S
789.97
742.6
727.6
41.15
748.82
Shallow
MW-203BR
787.26
690.09
685.09
33.55
753.71
Bedrock
MW-203D
785.57
696.51
691.51
31.9
753.67
Dee
MW-203S
786.14
755.95
740.95
31.9
754.24
Shallow
MW-204D
776.78
737.85
732.85
28.16
748.62
Dee
MW-204S
776.29
754.55
739.55
27.67
748.62
Shallow
MW2-7
777.64
762.02
747.02
13.27
764.37
Dee
MW2-9
797.38
792.77
782.77
4.91
792.47
Dee
MW-3
842.81
803.31
793.31
37.93
804.88
Shallow
MW-4
767.58
737.38
727.38
11.68
755.9
Shallow
MW-5
786.77
736.57
726.57
23.47
763.3
Shallow
MW-6
836.91
810.07
800.07
30.18
806.73
Shallow
MW-7
815.57
811.31
801.31
4.62
810.95
Shallow
013-4
777.6
762.57
747.57
21.68
755.92
Shallow
013-5
780.93
759.33
744.33
23.94
756.99
Shallow
013-9
799.59
760.42
751.02
36.79
762.8
Dee
SFMW 1D
823.62
779.62
774.62
35.25
788.37
Dee
SFMW-2D
848.62
798.62
793.62
42.22
806.4
Dee
SFMW-3D
794.99
748.23
743.23
34.91
760.08
Dee
SFMW-4D
781.28
743.5
738.5
23.38
757.9
Dee
SFMW-5D
808.46
774.09
769.09
35.89
772.57
Dee
Notes:
' - Manual water levels collected on April 8, 2019
Z CCR-4S pump intake is approximately 43 feet below top of casing
3 CCR-6S pump intake is approximately 12 feet below top of casing
4 CCR-8S pump intake is approximately 29.34 feet below top of casing
5 GWA-17S pump intake is approximately 41 feet below top of casing
6 Artesian conditions present
ft. BTOC - feet below top of casing
ft. NAVD 88 - feet North American Vertical Datum of 1988
BP - field measurement recorded as water level below pump intake
NA - not applicable due to no available data
* Abandoned sampling location
** - Survey information incomplete/not available
Prepared by: DAA Checked by: ALA
Page 3 of 3

TABLE 5-2
GROUNDWATER BALANCE SUMMARY
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Closure -by -
Modeling Scenario
Pre -Decanting
Post -Decanting
Closure -in -Place
Excavation
4.
4.
4.
4.
Water Balance Components
3 a
0
3 a
3 0-
0
3 a
� 0-
0
3 a
3 0-
0
3 a
O O,
p Ol
O O,
p Ol
O a,
p Ol
O O,
p Ol
LL
LL
LL
u_
Direct recharge to the ash basin
20
119
56
119
Direct recharge to the watershed outside of the ash
120
100
120
92
basin
Ash basin pond
200
Drainage inside the ash basin'
70
174
157
195
Drainage outside of the ash basin
16
11
Domestic water supply wells
Remediation wells (i.e. IAP extraction system)
2
2
2
Flow through and under the dam
150
45
Other
120
2
1
3
Prepared by: YG Checked by: ALA
Notes:
' Drainage includes streams, seeps, ditch, channel, canal, etc. Drainage streams included are depending on the scenario, where the pre -decanting scenario includes streams
present prior to closure and closure-bv excavation includes streams that form within the excavated ash basin footprint after closure.
Z Other refers to groundwater flow in/out the watershed that are not accounted in the above categories
Flow in refers to recharge to the groundwater system
Flow out refers to discharge from the groundwater system
Remediation wells (i.e. interim extraction system) were installed in late 2018, however the extent of the ash basin watershed under pre -decanting conditions does not include the interim extraction
system. Under post -decanting conditions the watershed extent expands to include
gpm - gallons per minute
Page 1 of 1

TABLE 5-3
SURFACE WATER CLASSIFICATIONS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Adjacent Surface Water Body
Surface Water Classification
(15A NCAC 02B .0300)
Belews Reservoir
Class C, WS-IV
Dan River
Class WS-IV, WS-V
Prepared by: ALA Checked by: CDE
Notes•
1. Class C waters are protected for uses such as secondary recreation, fishing, wildlife, fish consumption, aquatic life
including propagation, and survival.
2. Class WS-IV waters are protected as water supplies that are generally in moderately to highly developed watersheds.
WS-IV waters are also subject to Class C water quality standards.
3. Class WS-V waters are generally upstream of Class WS-IV waters or waters currently or formerly used by industry for
water supply. These waters are also protected for Class C uses.
NCAC - North Carolina Administrative Code
WS - Water Supply
Page 1of 1

TABLE 6-1
BORON CONCENTRATIONS IN GROUNDWATER BELOW SOURCE AREA
CORRECTION ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Well Beneath
Number of
Boron Concentration
Boron Concentration
Ash
Sample
Time Period of
Range in
Range in Overlying Pore
(Flow Zone)
Events
Record
Groundwater
Water
(Ng/L)
(pg/L)
AB-04BR
14
07/16/2015 -
25.7 j - 54
(bedrock)
10/18/2018
AB-04BRD
7
05/13/2016 -
27.6 j - < 50
(deep bedrock)
10/18/2018
< 50 - 21,900
(-60' saturated ash)
AB-04D
07/16/2015 -
(Deep)
14
10/18/2018
37.6 j - 212
AB-04SAP
4
03/21/2018 -
31.6 j - 258 M 1
(shallow)
10/18/2018
AB-05D
14
07/14/2015 -
30.4 j - < 50
926 - 17,100
(deep)
10/17/2018
(-45' saturated ash)
AB-06D
14
07/08/2015 -
27.5 j - < 50
69.2 - 1,600
(deep)
10/16/2018
(-13' saturated ash)
AB-07D
15
06/16/2015 -
26.9 j - 54
294 - 20,800
(deep)
10/15/2018
(-13' saturated ash)
AB-08D
15
06/17/2015 -
26.8 j - < 50
123 - 13,800
(deep)
10/16/2018
(-44' saturated ash)
Notes:
< - concentration not detected at or above the adjusted reporting limit.
j - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
M1 - Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
Prepared by: ALA Checked by: CDE
Page 1 of 1

TABLE 6-2
SOIL PSRG POG STANDARD EQUATION PARAMETERS AND VALUES
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Csoil = Cgw [Kd + My + %H')/Pbldf
Inorganic
Parameter Definition
Default Values
Units
Parameters
Csoil
Calculated source concentrations for soil
NA
mg/kg
CQW
Applicable groundwater target concentration:
15A NCAC 02L Standard
mg/L
15A NCAC 02L Standard
df
Dilution factor'
20
unitless
Kd
Soil -water partition coefficient for inorganics
4
Constituent Specific
L/kg
(range)
ew
Water filled soil porosity - vadose soils2
0.3
Lwater/Lsoll
ea
Air filled soil porosity - vadose soils3
0.13
Lair/Lsoil
Pb
Dry bulk density2
1.6
kg/L
Henry's law constant -dimensionless where:
H'
H' = Henry's law constant (atm - m3/mole) x
Constituent Specific3­5
unitless
conversion factor of 41
Prepared by: ALA Checked by: CDE
Notes:
' - Default value from Soil Screeninq Guidance: Technical Backqround Document (USEPA, 1996)
2 - Site specific value (Murdoch et al., 2019). Effective porosity represents unconsolidated material.
3 - DEQ default value appropriate for North Carolina
4 - Constituent Specific- Soil water partition coefficients (Kd) were obtained from the Groundwater Quality Signatures for
Assessing Potential Impacts from Coal Combustion Product Leachate (EPRI, 2012). Sulfate Kd ranges from 0.1 to 2.1,
based on sands/sediments and a pH range of 4.6 to 7.2
5 - a value of 0 is used for sulfate
NA - Not applicable
mg/L - milligrams per liter
L/kg - liters per kilogram
Lw, ,/Lso;, - volume of water filled spaces per volume of soil
La;r/Lso;, - volume of air filled spaces per volume of soil
kg/L - kilogram per liter
Page 1 of 1

TABLE 6-3
SUMMARY OF UNSATURATED SOIL ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Analytical Parameter
pH
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chloride
Chromium
Cobalt
Iron
Manganese
Molybdenum
Selenium
Strontium
Sulfate
Thallium
Vanadium
Reporting Units
S.U.
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
PSRG Protection of Groundwater
NE
0.9
5.8
580
63
45
3
938*
3.8*
0.9
150
65
7.1
2.1
1,500
1438*
0.28
350
2018 Background Threshold Valued
4.3-5.8
1 0.6
1 13
1 139
1 19
1 17
1 0.03
1 14
1 36
1 51
1 40,400
1 1,117
1 9.8
5
9
12
0.7
114
2019 Background Threshold ValueS214.6-7.01
0.6
1 43
1 122
1 2.9
1 35
1 0.9
1 402
1 47
1 60
1 61,967
1 1,257
1 4
5
7
403
0.8
231
Sample ID
Sample
Collection Date
Analytical Results
Background Unsaturated Soil
BG-01D (1-2)
03/26/2015
4.8 j
<3.1
35
42
0.89
<15.5
<0.37
<305
29
1.7 j
38,100
58
<3.1
<3.1
1.9 j
<305
<3.1
55
BG-01D (11-11)
03/27/2015
5.7 j
<3.9
11
27
0.68
12 j
<0.47
<396
4.7
29 j-
12,200
1,010
8.9
<3.9
<3.9
<396
<3.9
14
BG-01D (21-21)
03/27/2015
5.4 j
<3.9
7.5
50
0.88
13 j
<0.47
<400
2.3
6.8
12,400 j+
257 j+
<3.9
2.2 j
<3.9
<400
<3.9
16
BG-01D (31-31)
03/27/2015
5.6 j
<3.5
31
42
2.8
39
<0.42
<358
17
38
40,400
871
<3.5
2.9 j
<3.5
<358
<3.5
51
BG-02D (1-2)
03/23/2015
5.5 j
<3.8
3.31
25
0.32 j
<18.9
<0.45
<363
8.5
<3.8
24,100
53
<3.8
<3.8
<3.8
<363
<3.8
47
BG-02D (10-12)
03/24/2015
5.0 j
<3.5
2.7 j
71
0.86
35 j
<0.42
<352
5.3
5.5
32,300
245
<3.5 j
3 j
<3.5 j
<352
<3.5
105
BG-02D (20-22)
03/24/2015
5.1 j
<3.7
<3.7
89
0.29 j
<18.5
<0.45
<367
<1.9 j
5
9,570
450
<3.7 j
<3.7
<3.7 j
<367
<3.7
20
BG-02D (30-32)
03/24/2015
5.2 j
<4
<4
92
0.33 j
<20.1
<0.48
<403
<2 j
5
13,000
680
<4 j
<4
<4 j
<403
<4
27
BG-03S (1-2)
05/12/2015
5.4 j
<6.4
<6.4
30
0.37
14 j
<0.77
<329
16
<6.4
27,800
40
<3.2
<4.8
<3.2
<329
<6.4
60
BG-03S (10-12)
05/12/2015
4.9 j
<7.6
<7.6
32
0.75
21
<0.91
<362
22
16
44,200
513
<3.8
<5.7
<3.8
<362
<7.6
141
BG-03S (20-22)
05/12/2015
5.0 j
<6.1
<6.1
68
0.76
17
<0.73
<308
15
8.1
36,800
216
<3
<4.6
<3
<308
<6.1
55
BGSB-01 (1-2)
07/26/2017
4.8
<0.46
59 B
38
1.6
<8.1
<0.023
3.4 j
37
3.5
49,000
66 B
0.98 j
1.5
2.5 j
<12
0.38
64
BGSB-01 (5-7)
07/26/2017
4.6
<0.47
22 B
18
1.6
<2.4
<0.023
1.9 j
19
1.1
21,000
39 B
<1.9
0.84 j
0.82 j
<12
0.15
42
BGSB-01 (10-12)
07/26/2017
4.7
<0.6
9.1 B
47
1.4
<1.6
<0.03
1.2 j
6.9
5.8
12,000
180 B
0.56 j
1 j
0.76
<12
0.39
13
BGSB-01 (15-17)
07/26/2017
5.0
<0.4
5.6 B
46
1.3
<3.8
<0.02
<12
6.7
16
8,700
230 B
<3
1.9
1.9
<12
0.66
9.8
BGSB-01 (20-22)
07/26/2017
4.8
<0.52
6.3 B
62
1.3
1.2 j
<0.026
<11
5
21
11,000
250
0.97 j
1.5
2.8
<11 M
0.6
8.6
BGSB-02 (1-2)
07/26/2017
4.9
<0.37
3.9 B
14
0.28
<2.8
<0.019
4.2 j
10
1.8
22,000
59 B
<2.2
0.71 j
1.5
8 j
0.14
65
BGSB-02 (10-12)
07/26/2017
4.6
<0.51
0.5 j,B
27
0.27
<10
<0.026
<12
1.1 j
4.8
11,000
110 B
<8.1
1.8
<4
<12
0.066 j
35
BGSB-02 (15-17)
07/26/2017
5.0
<0.45
0.54 B
42
0.37
<17
0.025
<11
2.6 j
7.2
12,000
490
<13
2.7
<6.7
<11
0.19
24
BGSB-02 (20-22)
07/26/2017
5.0
<0.57
1.2 B
70
0.51
<22
<0.029
<12
7.8
7.2
17,000
480
<18
4.5
<9
<12
0.26
35
BGSB-02 (25-27)
07/26/2017
5.0
<0.38
0.85 B
140
0.57
<23
<0.019
<12
1.2 j
6.2
14,000
490
<19
4.1
<9.3
<12
0.27
18
BGSB-02 (30-32)
07/26/2017
5.3
<0.38
0.77 B
71
0.47
<8.8
0.033
<12
3.6
17
14,000
550 B
<7.1
2.2
<7.1
<12
0.34
23
BGSB-03 (1-2)
07/26/2017
5.0
<0.41
3.2 B
22
0.39
<3.7
0.032
<11
20
1.4
22,000
42 B
0.5 j
0.56 j
1.7
<11
0.1 j
37
BGSB-03 (5-7)
07/26/2017
5.0
<0.3
2.8 B
38
0.56
<2.3
<0.015
1.8 j
5.1
6.7
9,800
170 B
0.81 j
0.96
0.33 j
<11
0.27
28
BGSB-03 (10-12)
07/26/2017
5.2
<0.39
2.2 B
64
0.66
<13
<0.02
<12
27
31
25,000
540 B
<10
2.8
<5
<12
0.32
95
BGSB-03 (15-17)
07/26/2017
4.9
<0.43
3.6 B
82
1.1
<12
0.032
<14
4.4
32
18,000
470 B
<9.8
5
<4.9
<14
0.65
99
BGSB-03 (20-22)
07/26/2017
4.9
0.14 j
4.9 B
53
5.9
<10 M
0.013 j
<14
43 M
22
51,000 M
630 B,M
<8.2 M
2.5
<4.1
<14
0.2
280
GWA-03D (34-35.5)
05/04/2015
7.0 j
<7.7
<7.7
108
0.97
<19.3
<0.93
<366
1.1 j
<7.7
9,110
460
<3.9 j
<7.7
11
<366
<7.7
18
GWA-04S (45-47)
03/05/2015
6.4 j
<2.8
<2.8
80
0.52
5
<0.33
<284
1 j+
2.2 j
7,760
383
<0.56
<2.8
4.3
<284
<2.8
9.4
GWA-12D (10-12)
04/15/2015
5.6 j
<6.2
<6.2
27
<0.31
<15.4
<0.74
<315
<1.5 j
6.5
912
296
<3.1
<6.2
<3.1 j
<315
<6.2 j
<6.2
GWA-12D (15-17)
04/15/2015
5.4 j
<5.6
<5.6
99
0.39
<13.9
<0.67
<281
<1.4 j
2.9 j
7,740
187
<2.8
<5.6
<2.8 j
<281
<5.6 j
<5.6
GWA-12D (20-22)
04/15/2015
5.3 j
<5.8
<5.8
91
0.43
<14.5
<0.69
<285
0.97 j
3.5 j
7,870
135
<2.9
<5.8
<2.9 j
<285
<5.8 j
8.2
GWA-12D (25-27)
04/15/2015
NA
<7.9
<7.9
83
0.59
<19.6
<0.94
<402
4.7
4.53
9,790
247
<3.9
<7.9
<3.9 j
<402
<7.9 j
10.6
GWASB-12 (5-7)
07/26/2017
4.4
<0.42 M
6.7 B
16
0.36
<2.1
<0.021
2.2 j
9.4
1
11,000
43 B
1.2 j
1.1
1
<13 M
0.14
20 M
GWASB-12 (10-12)
07/26/2017
4.6
0.09 j
3.2 B
20
0.42
<2.9
<0.019
7 j
6.8
2
7,100
130 B
1.1 j
1.7
1.6
8.7 j,M
0.099 j
12
GWASB-12 (15-17)
07/26/2017
5.0
<0.31
3.2 B
51
0.53
<9.2
<0.015
<12
3.1
7
7,200
200 B
<7.4
2.8
<3.7
<12
0.22
12
GWASB-12 (20-22)
07/26/2017
5.1
<0.36
2 B
30
0.48
<42
0.016 j
1.2 j
6.6 j
2.7
9,900
380
<34
7.7
<17
<12
0.17
8.4
Page 1 of 2

TABLE 6-3
SUMMARY OF UNSATURATED SOIL ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Analytical Parameter
pH
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chloride
Chromium
Cobalt
Iron
Manganese
Molybdenum
Selenium
Strontium
Sulfate
Thallium
Vanadium
Reporting Units
S.U.
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
PSRG Protection of Groundwater
NE
0.9
5.8
580
63
45
3
938*
3.8*
0.9
150
65
7.1
2.1
1,500
1438*
0.28
350
2018 Background Threshold Valued
4.3-5.8
1 0.6
1 13
1 139
1 19
1 17
1 0.03
1 14
1 36
1 51
1 40,400
1 1,117
1 9.8
5
9
12
0.7
114
2019 Background Threshold ValueS214.6-7.01
0.6
1 43
1 122
1 2.9
1 35
1 0.9
1 402
1 47
1 60
1 61,967
1 1,257
1 4
5
7
403
0.8
231
Sample ID
Sample
Collection Date
Analytical Results
GWASB-12 (25-27)
07/26/2017
5.5
1 0.32
1 1.2 B
46
0.59
<23
<0.016
<12
5.9
6.1
1 9,500
230 B
<9.1
5.1
<9.1
<12
0.18
9.9
Upgradient of Ash Basin Unsaturated Soil
GWA-05S (25-26.5)
03/18/2015
4.2 j
<3.4
2.4 j
121
0.42
<17.1
<0.41
<332
<1.7 j
3.3 j
4,590
450
<0.68 j
2.6 j
3.8
<332
<3.4
7.9
GWA-07S (30-31.5)
03/10/2015
5.4 j
<3.5
3.4 j
488
2.7
17 j
<0.42
<362
3
11
26,100
226
<3.5
5.6
9.6
<362
<3.5
76
GWA-08D (20-21.5)
04/07/2015
5.1 j
<7.6
<7.6
83
0.74
<19
<0.91
<387
2.2
<7.6
7,910
103
<3.8
<7.6
6.2
<387
<7.6
11
GWA-09GTB (40-41.5)
05/27/2015
5.9 j
<6.1 j
10.2 j-
620 j-
5.1 j-
31 j-
<0.74
<325 j
55 j-
16 j-
44,100 j-
640 j
<3.1 j
3.6 j-
3.2 j-
<325 j
<6.1
96 j-
MW-202BR (40-42)
03/20/2015
5.2 j
<2.8
1.6 j
33
0.64
5.6
<0.34
<278
2 j+
12
6,870
156
<0.57
2.3 j
1.5
<278
<2.8
7.3
MW-202BR (47-49)
03/20/2015
6.0 j
<3.2
<3.2
28
0.33
<3.2
<0.38
<306
0.63 j+
<3.2 j
1,130
18.5
<0.64
<3.2
1.9
<306
<3.2
<3.2
MW-202BR (60-61.5)
03/09/2015
6.0 j
<3.4
<3.4
117
1.9
10
0.24 j
<329
10.1
8.7
12,000
213
<0.69
<3.4
7.3
<329
<3.4
25
MW-203BR (20-21.5)
03/18/2015
4.2 j
<3.4
<3.4
62
0.38
11 j
<0.41
<331
1.8
7.9
9,350
281
<0.69 j
<3.4
0.86
<331
<3.4
32
Within Ash Basin Waste Boundary Unsaturated Soil (Fill Material)
AB-01S (20-21.5)
05/09/2015
5.7 j
<6
61
54
3.1
<15.1
<0.72
<290
25
23
40,600
583
<3
<6
<3
<290
<6
45
AB-03D (40-41.5)
04/14/2015
6.5 j
<6.8
5.6 j
45
2.4
<16.9 j
<0.81
173 j
9.6
18
18,400
306
<3.4 j
<6.8
4.7
<338
<6.8
13
Downgradient of Ash Basin Unsaturated Soil
GWA O1S (20-21.5)
03/26/2015
5.2 j
<2.9
57
85
5.3
<14.6
<0.35
<283
33
13
34,400
358
<2.9
<2.9
<2.9
<283
<2.9
44
GWA-10D (2-3)
04/13/2015
5.2 j
<7.6
62
39
1.9
<19.1 j
<0.92
<364 j
19
27
32,600
689
2 j
<7.6
<3.8 j
<364
<7.6
29
MW-200BR (0-1.5)
04/24/2015
4.9 j
<6.8
44
36
1.3
26
<0.81
<332
40
4.3 j
25,100
68
<3.4
<6.8
<3.4
<332
<6.8
25
Notes: Prepared by: DAA Checked by: ALA
1 - Background threshold values were calculated using data from background unsaturated soil samples collected June 2015 to April 2017. Background values approved by NCDEQ on May 14, 2018.
Z - Updated background threshold values were calculated using data from background unsaturated soil samples collected June 2015 to April 2017. The background threshold value updates retained extreme outlier concentrations in background unsaturated soil datasets (SynTerra, 2019).
O bold highlighted concentration indicates value is greater than applicable regulatory standarad (PSRG POG)
0 bold highlighted concentration indicates value is greater than greatest background threshold value where there is no regulatory standard, or background threshold values are greater than regulatory standard
O highlighted concentration indicates value is within range of background threshold values for constituents where there is no regulatory standard, or a background threshold value greater than regulatory standard
*NC PSRG for POG is for hexavalent chromium, soil analytical is for total chromium
< - concentration not detected at or above the adjusted reporting limit.
*Calculated PSRG for POG; Using NCDEQ IHSB Preliminary Soil Remediation Goals companion notes (February 2018)
B - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 1OX the concentration in the method blank. Analyte concentration in sample could be due to blank contamination.
j - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
j- - Estimated concentration, biased low.
j+ - Estimated concentration, biased high.
M - Matrix spike / matrix spike dup failure.
BTV - background threshold value
mg/kg - milligrams per kilograms
NA - not applicable due to no available data
NE - Not Established
PSRG - Preliminary Soil Remediation Goals for the Protection of Groundwater (POG); NCDEQ Inactive Hazardous Sites Branch (IHSB) Preliminary Soil Remediation Goals table (February 2018)
POG - Protection of Groundwater
S.U. - Standard Unit
Page 2 of 2

TABLE 6-4
SOURCE AREA INTERIM ACTIONS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Groundwater and Surface
Groundwater and Surface Water Remedy
Water Interim Actions
Active source remediation by removing ponded water in the ash basin.
Decanting will lower the hydraulic head within the coal ash basin and
reduce hydraulic gradients, reducing groundwater seepage velocities and
Ash Basin Decanting
COI transport potential. Decanting will return the groundwater flow
system to its approximate condition, prior to construction of the ash
basin, with the re-establishment of groundwater flow divides and
groundwater flowing toward the perennial stream and then northward.
A 10-well groundwater extraction was installed adjacent to Parcel A in the
area northwest of the ash basin. The system was activated on March 14,
2018. The system currently operates at approximately 12 gpm extraction
Interim Action Plan Accelerated
flow rate. As of November 2019, approximately 9,900,000 gallons of
Remediation Groundwater
water have extracted by the system. Post -decanting, the 10 interim
Extraction System
action extraction wells are expected to have reduced extraction rates as a
result of the reduced hydraulic head of the ash basin. The system is
predicted to remove a total of 2.5 gpm. Continued operation of the
system is included in the remedial alternatives evaluated.
Modifications to the BCSS dam include tree removal, installation of an
aggregate seepage collection and filter overlay system, and installation of
Source Area Stabilization
flumes, riprap channels, and stormwater culverts, riprap lined ditches,
seepage collection berm and a concrete ditch among other items that can
be found in an August 5, 2016 letter of record documentation (Appendix
A).
A toe -drain water collection system that consists of a 16-inch diameter by
18-feet deep wet well has been installed below the ash basin dam
adjacent to the un-named tributary. The wet well storage capacity is
Toe -Drain Water Collection
approximately 2,000 cubic feet. The system construction and testing is
System
complete and will begin operation in January 2020. Once in operation,
the toe -drain system will collect water from the toe of the ash basin dam
and route it to the Dan River through new discharge piping to a permitted
NPDES outfall.
Prepared by: ALA Checked by: CDE
Page 1 of 1

TABLE 6-5
MEANS OF GROUNDWATER COIs - JANUARY 2018 TO APRIL 2019
CORRECTIVE ACTIVE PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Analytical Parameter
pH
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chloride
Chromium (VI)
Chromium
Cobalt
Iron
Lithium
Manganese
Molybdenum
Selenium
Strontium
Sulfate
Thallium
Total
Dissolved
Solids
Vanadium
Reporting Units
S.U.
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
mg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
mg/L
pg/L
mg/L
pg/L
15A NCAC 02L Standard
6.5-8.5
1*
10
700
4*
700
2
250
NE
10
1*
300
NE
50
NE
20
NE
250
0.2*
500
0.3*
2018 Background Threshold Values (Shallow Flow Zone)'
5.1-6.0
1
1
58
1 0.362
50
1
15
1.75
4.72
0.509
750
NE
22.9
1
0.5
56.5
1.93
0.2
85
1.33
2019 Background Threshold Values (Shallow Flow Zone)Z
5.2-6.0
1
1
123
0.3
50
1
19
4
11
0.6
1600
2
40
0.5
1
46
2.043
0.2
93
3
2019 Background Dataset Range (Shallow Flow Zone)Z
5.3-5.9
0.1-1.1
0.04-1
19-124
0.03-0.6
2.5-50
0.03-1.0
1.2-18.8
0.2-2.7
0.5-11.7
0.02-1.3
22-11,100
0.39-2
3-189
0.1-1.3
0.1-1.4
7.9-48
0.1-2.4
0.02-0.2
20-90
0.1-6.4
2018 Background Threshold Values (Deep Flow Zone)'
5.2-7.0
1
1
12.6
0.219
50
1
20.9
0.411
3.3
1.6
240
NE
13
1
0.5
68.5
6.35
0.2
148
1.45
2019 Background Threshold Values (Deep Flow Zone)Z
5.6-7.0
1
1
16
0.1
50
0.08
19
0.6
3
2
226
95
57
2
0.5
73
8.447
0.1
134
2
2019 Background Dataset Range (Deep Flow Zone)Z
5.6-7.0
0.1-1.5
0.05-1.1
0.004-0.2
0.01-0.02
11.9-58.8
0.03-0.2
2.0-20.3
0.03-0.5
0.1-5.0
0.02-1.8
13-850
2.2-52.2
2.5-104
0.1-5.3
0.2-3.7
29.3-87.8
0.5-11
0.02-0.1
25-126
0.1-1.4
2018 Background Threshold Values (Bedrock Flow Zone)'
6.2-8.4
0.5
0.51
6.2
0.2
50
0.08
3
0.33
5.3
0.76
228
NE
9.9
3.7
0.5
100
9.6
0.1
133
0.82
2019 Background Threshold Values (Bedrock Flow Zone)Z
6.3-6.5
1
2
11
0.2
50
0.08
3
0.4
11
0.8
341
30
64
6
0.5
99
15.4
0.1
181
2
2019 Background Threshold Values (Bedrock Flow Zone)Z
6.2-8.4
0.1-1.4
0.1-1.5
3.0-11
0.01-0.2
33.3-50
0.03-0.1
2.3-3.2
0.03-0.3
0.5-34.7
0.03-0.8
27-228
3.9-30
3.9-87.1
0.5-3.7
0.4-0.5
32.6-100
2.5-22.5
0.1-0.1
52-250
0.2-2.3
Sample ID Flow Zone
Mean, Geomean, or Median Result3
Background Locations°
BG-01D
Transition Zone
7.5
<0.5
0.52
13
0.10
51
0.096
12
0.29
0.74
0.49
135
52.4
64
<0.5
<0.5
89
6.7
<0.1
209
<0.3
BG-01S
Shallow
5.5
<0.5
0.083
9.8
0.18
3.6
<0.08
7.6
50
1.1
4.4
1.3
<0.5
0.87
0.14
49
BG-02BRA
Bedrock
8.7
0.65
0.93
5.5
<0.1
<50
<0.08
3.1
0.12
1.5
0.19
103
35
39
8.4
<0.5
79
14
<0.1
154
0.69
BG-02D
Transition Zone
6.6
<0.5
<0.1
5.8
<0.1
<50
<0.08
18
0.20
0.69
0.11
<50
15
<5
2.0
<0.5
38
2.6
<0.1
123
1.2
BG-02S
Shallow
5.8
<0.5
0.11
77
0.10
<50
<0.08
13
2.2
2.3
0.11
357
2.5
12
0.72
<0.5
34
0.76
<0.1
71
0.98
BG-03D
Transition Zone
6.0
<0.5
0.084
12
<0.1
<50
<0.08
4.9
0.045
<0.5
<0.1
75
2.5
5.8
<0.5
<0.5
46
<1
<0.1
70
0.51
BG-03S
Shallow
5.4
<0.5
<0.1
40
0.25
<50
<0.08
2
0.42
1.1
0.12
261
1.5
14
<0.5
<0.5
27
<1
<0.1
52
0.48
MW-202BR
Bedrock
6.4
<0.5
0.17
<5
<0.1
<50
<0.08
2.7
0.21
1.4
<0.1
<50
4.2
<5
0.57
:<5
34
3.7
<0.1
<250
0.48
MW-202D
Transition Zone
6.0
<0.5
%
<5
<0.1
<50
<0.08
2.5
0.25
0.60
<0.1
<50
3.3
<5
<0.5
<0.5
38
1.5
<0.1
<250
0.39
MW-202S
Shallow
5.7
<0.5
<0.1
24
0.19
<50
<0.08
1.4
1.0
1.2
<0.1
<50
<0.5
<5
<0.5
<0.5
11
<1
<0.1
<250
0.30
At or Within the Waste Boundary Locations
AB-01BR
Bedrock
7.2
<0.5
1.0
129
0.11
5,630
<0.08
340
0.033
2.5
1.0
2,400
93
707
3.7
<0.5
824
7.6
<0.1
723
0.21
AB-01BRD
Bedrock
12.3
-
-
-
-
422
-
-
-
-
-
-
-
-
-
-
-
-
-
-
AB-01D
Transition Zone
5.6
<0.5
3.3
160
0.63
9,265
0.53
396
0.034
2.0
35
156
5.9
1,833
0.68
1.5
590
117
0.37
914
0.13
AB-01S
Shallow
5.9
<0.5
3.9
86
0.094
10,240
0.25
392
0.032
1.3
29
231
0.9
1,865
0.31
1.0
680
141
0.32
962
0.21
AB-02BR
Bedrock
8.0
103
0.48
8,870
1.0
410
1.1
1.4
83
8.5
104
12,200
1.5
1,660
53
0.17
1 100
0.33
AB-02BRD
Bedrock
12.2
-
-
-
-
20.2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
AB-02D
Transition Zone
5.8
1.1
2.2
92
0.57
9,552
0.49
408
<0.025
1.6
70
1,012
11.3
9,030
0.76
0.67
678
75
0.50
922
<0.3
AB-02S
Shallow
6.6
<0.5
1.7
23
<0.1
50.7
<0.08
6.3
0.14
1.0
1.2
231
0.7
528
2.0
<0.5
34
6.9
0.15
95.4
10
AB-03BR
Bedrock
11.1
-
-
-
-
538
-
-
-
-
-
-
-
-
-
-
-
-
-
-
AB-03D
Transition Zone
7.2
<0.5
15.4
8.0
<0.1
2,836
<0.08
292
<0.025
1.9
2.8
445
198
91
5.3
<0.5
436
33
<0.1
721
0.24
AB-03S
Shallow
6.3
<0.5
0.97
131
0.087
10,510
<0.08
37S
<0.025
0.76
9.0
412
0.7
3,538
5.6
0.41
666
118
0.49
919
0.37
AB-04BR
Bedrock
7.5
<0.5
0.48
6
<0.1
<50
<0.08
1.8
0.15
<0.5
<0.1
<50
11
17
3.9
<0.5
86
5.5
<0.1
<250
2.4
AB-04BRD
Bedrock
8.9
<0.5
0.75
5.4
<0.1
<50
<0.08
1.1
0.035
<0.5
<0.1
<50
6.6
11
7.3
<0.5
64
14
<0.1
143
<0.3
AB-04D
Transition Zone
6.2
0.21
3.4
23
<0.1
56
<0.08
3.3
0.69
0.72
0.094
71.4
12
162
4.3
0.64
1 159
3.0
<0.1
1 172
4.2
AB-04LOWERASH
Ash Pore Water
9
7.1
409
47
<0.1
1,015
0.14
18
0.063
<0.5
0.10
176
26
22
963
2.7
498
77
<0.1
361
2.4
AB-04S
Ash Pore Water
7.1
<0.5
101
135
<0.1
15,850
<0.08
544
0.025
0.57
0.071
10,564
76
819
16
<0.5
1476
214
<0.1
1,376
<0.3
AB-04SAP
Shallow
5.7
0.37
2.6
99
0.17
91
<0.08
3.9
0.52
0.88
0.67
94
7.5
131
1.5
1.1
195
3.7
0.38
158
5.3
AB-04SL
Ash Pore Water
10.8
-
-
-
-
14 000
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
AB-05D
Transition Zone
6.6
<0.5
0.90
10
<0.1
<50
<0.08
0.88
0.43
0.71
0.095
79
4.5
6.6
2.3
0.67
50
4.4
<0.1
<250
3.4
AB-05S
Ash Pore Water
8.1
<0.5
100
224
0.11
7323
<0.08
327
<0.025
<0.5
0.11
1,002
75
1,098
26
<0.5
1,260
186
<0.1
849
0.24
AB-05SL
Ash Pore Water
10.1
1 6.6
57
197
<0.1
12,008
<0.08
1 330
<0.025
0.97
0.045
<50
217
1 <5
304
4.1
3475
206
0.038
1465
157
AB-06D
Transition Zone
6.6
<0.5
0.088
19
<0.1
<50
<0.08
1.4
1 0.31
0.43
<0.1
50
3.5
<5
1.3
<0.5
56
3.4
1 <0.1
<250
3.5
AB-06S
Ash Pore Water
6.6
0.81
3.9
209
<0.1
115
<0.08
4.7
0.085
0.70
1.1
582
12
15
4.5
2.2
124
20
<0.1
<250
3.2
AB-06SL
Ash Pore Water
6.9
<0.5
5.9
223
<0.1
507
<0.08
7.4
<0.025
0.57
<0.1
2,482
43
116
0.85
<0.5
735
<1
<0.1
<250
0.67
AB-07D
Transition Zone
6.7
<0.5
0.19
20
<0.1
<50
<0.08
4.8
0.069
0.25
0.09
153
9.3
25
1.1
<0.5
42
12.0
<0.1
<250
1.0
AB-07S
Ash Pore Water
5.1
<0.5
30
30
1.2
2,315
0.68
108
0.030
1.2
34
53,040
56
2,768
1.9
1.7
494
320
3.1
765
0.61
AB-08D
Transition Zone
6.1
<0.5
0.92
8.2
<0.1
<50
0.04
15.6
0.029
0.79
0.36
66
15
37
0.22
<0.5
71.6
<1
<0.1
<250
0.41
AB-08S
Ash Pore Water
5.6
0.74
1 2.1
125
0.32
3,871
0.51
128
0.028
0.45
12
1,254
37
165
6.9
11
467
69
4.3
401
1 1.4
AB-08SL
Ash Pore Water
6.8
0.22
259
335
0.11
6,733
<0.08
7.4
<0.025
1.8
0.52
56,475
45
1,030
80
0.56
1,187
1 6.8
0.064
376
23
AB-09BR
Bedrock
7.7
<0.5
16
14
<0.1
<50
<0.08
4.4
0.029
0.54
0.071
1024
12
585
1.9
<0.5
115
4.8
<0.1
179
<0.3
AB-09D
Transition Zone
7.3
0.25
3.3
5.3
<0.1
72.3
<0.08
5
<0.025
0.45
0.18
289
6.6
95
8.2
<0.5
71.2
13
<0.1
205
0.22
AB-09S
Shallow
5.2
<0.5
0.094
52
0.11
<50
<0.08
6.2
0.066
0.46
16
241
0.7
559
<0.5
<0.5
6.8
<1
0.12
34
<0.3
CCR-01D
Transition Zone
6.9
<0.5
9.1
5.7
<0.1
11
<0.08
26
1.3
0.78
-
78
3.8
0.57
20.1
<0.1
155
CCR-01S
Shallow
4.8
<0.5
0.47
54
0.38
28
0.083
17
1.0
8.7
7.3
<0.5
0.30
<1
0.14
45
CCR-02D
Transition Zone
5.2
<0.5
1.4
16
1.2
3,862
0.97
237
0.060
<0.5
7.5
<50
72
2 605
I <0.5
<0.5
621
3.0
<0.1
477
<0.3
CCR-02S
Shallow
4.3
<0.5
15
411
2.7
6,266
0.36
292
0.028
4.3
256
109
9.1
6,350
<0.5
15
25
36
0.80
575
<0.3
CCR-04D
Transition Zone
7.1
<0.5
1.8
49
<0.1
6,685
<0.08
386
1.8
1.7
218
2.3
<0.5
27
1 <0.1
866
CCR-04S
Shallow
5.2
<0.5
1.3
1 275
1 2.4
7,793
0.65
291
1.5
9.0
12
<0.5
1.8
46
0.65
563
CCR-05D
Transition Zone
12
55
CCR-05S
Shallow
5.5
<0.5
2.3
164
0.28
10,630
0.1
398
-
<0.5
35
3.6
<0.5
2.5
125
0.36
941
CCR-06D
Transition Zone
5.5
<0.5
0.80
195
0.88
10,825
0.51
404
0.54
15
10
<0.5
1.4
110
0.52
892
R- 7D
Transition Zn
<0.5
0.2
17
<0.1
1 5,148<0.08
317
<0.5
1 1.1
59
<
<0.5
1 32
1 <0.1
761
Page 1 of 4

TABLE 6-5
MEANS OF GROUNDWATER COIs - JANUARY 2018 TO APRIL 2019
CORRECTIVE ACTIVE PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Analytical Parameter
pH
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chloride
Chromium (VI)
Chromium
Cobalt
Iron
Lithium
Manganese
Molybdenum
Selenium
Strontium
Sulfate
Thallium
Total
Dissolved
Solids
Vanadium
Reporting Units
S.U.
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
mg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
mg/L
pg/L
mg/L
pg/L
15A NCAC 02L Standard
6.5-8.5
1*
10
700
4*
700
2
250
NE
10
1*
300
NE
50
NE
20
NE
250
0.2*
500
0.3*
2018 Background Threshold Values (Shallow Flow Zone)'
5.1-6.0
1
1
58
1 0.362
50
1
15
1.75
4.72
0.509
750
NE
22.9
1
0.5
56.5
1.93
0.2
85
1.33
2019 Background Threshold Values (Shallow Flow Zone)2
5.2-6.0
1
1
123
0.3
50
1
19
4
11
0.6
1600
2
40
0.5
1
46
2.043
0.2
93
3
2019 Background Dataset Range (Shallow Flow Zone)2
5.3-5.9
0.1-1.1
0.04-1
19-124
0.03-0.6
2.5-50
0.03-1.0
1.2-18.8
0.2-2.7
0.5-11.7
0.02-1.3
22-11,100
0.39-2
3-189
0.1-1.3
0.1-1.4
7.9-48
0.1-2.4
0.02-0.2
20-90
0.1-6.4
2018 Background Threshold Values (Deep Flow Zone)'
5.2-7.0
1
1
12.6
0.219
50
1
20.9
0.411
3.3
1.6
240
NE
13
1
0.5
68.5
6.35
0.2
148
1.45
2019 Background Threshold Values (Deep Flow Zone)2
5.6-7.0
1
1
16
0.1
50
0.08
19
0.6
3
2
226
95
57
2
0.5
73
8.447
0.1
134
2
2019 Background Dataset Range (Deep Flow Zone)2
5.6-7.0
0.1-1.5
0.05-1.1
0.004-0.2
0.01-0.02
11.9-58.8
0.03-0.2
2.0-20.3
0.03-0.5
0.1-5.0
0.02-1.8
13-850
2.2-52.2
2.5-104
0.1-5.3
0.2-3.7
29.3-87.8
0.5-11
0.02-0.1
25-126
0.1-1.4
2018 Background Threshold Values (Bedrock Flow Zone)'
6.2-8.4
0.5
0.51
6.2
0.2
50
0.08
3
0.33
5.3
0.76
228
NE
9.9
3.7
0.5
100
9.6
0.1
133
0.82
2019 Background Threshold Values (Bedrock Flow Zone)2
6.3-6.5
1
2
11
0.2
50
0.08
3
0.4
11
0.8
341
30
64
6
0.5
99
15.4
0.1
181
2
2019 Background Threshold Values (Bedrock Flow Zone)2
6.2-8.4
0.1-1.4
0.1-1.5
3.0-11
0.01-0.2
33.3-50
0.03-0.1
2.3-3.2
0.03-0.3
0.5-34.7
0.03-0.8
27-228
3.9-30
3.9-87.1
0.5-3.7
0.4-0.5
32.6-100
2.5-22.5
0.1-0.1
52-250
0.2-2.3
Sample ID Flow Zone
Mean, Geomean, or Median Result3
At or Within the Waste Boundary Locations Continued
CCR-07S
Shallow
4.8
<0.5
0.13
162
3.9
84
0.26
82
<0.5
16
7.4
<0.5
<0.5
<1
0.26
183
CCR-08AD
Transition Zone
5.6
<0.5
0.69
204
1.1
9,363
1.8
415
0.70
0.81
29
<0.5
<0.5
84
0.17
788
CCR-08D
Transition Zone
5.8
<0.5
0.48
50
0.32
10,017
0.73
430
<0.5
43
60
<0.5
<0.5
80
0.13
773
CCR-08S
Shallow
5.5
<0.5
0.60
175
1.6
9,793
1.2
377
3.7
18
4.8
0.54
0.83
104
0.45
746
CCR-09D
Transition Zone
6.2
<0.5
0.17
5.1
<0.1
42
<0.08
18
1.1
0.14
16
0.86
0.61
18
<0.1
150
CCR-09S
Shallow
6.0
<0.5
<0.1
21
<0.1
289
<0.08
25
1.8
<0.1
5.2
<0.5
0.51
8.7
<0.1
152
CCR-11S
Shallow
6.3
<0.5
2.4
221
<0.1
6.9
<0.08
22
0.76
32
<2.5
0.66
<0.5
7.4
<0.1
377
CCR-1113
Transition Zone
1 5.8
1 0.5
0.25
42
0.063
4.5
0.08
16
0.61
0.96
7.6
1.11
0.5
1
17
0.1
1 250
CCR-12DA
Transition Zone
9.0
0.95
1.4
11
<0.1
4.7
<0.08
2.3
1.1
0.11
27.7
6.0
<0.5
21
<0.1
147
CCR-12S
Shallow
5.4
<0.5
<0.1
85
0.18
12
<0.08
2.8
0.68
<0.1
0.8
<0.5
<0.5
<1
<0.1
41
EXOB-01
Transition Zone
6.7
<0.5
25
24
<0.1
7,845
0.13
381
<0.025
4.3
192
12.772
70
3,180
2.4
<0.5
1 797
37
<0.1
864
<0.3
EXOB-02
Transition Zone
5.2
<0.5
4.9
218
1.6
8,083
0.69
423
0.043
1.0
139
1 99
1 11
4,600
<0.5
5.6
I 390
93
0.84
I 989
<0.3
At or Beyond the Compliance Boundary Locations
Upgradient or the Ash Basin
GWA-03D
Transition Zone
6.1
<0.5
0.12
22.3
<0.1
<50
<0.08
9.7
1.0
3.0
0.095
201
2.4
10.3
0.54
<0.5
97.7
<1
<0.1
94
0.79
GWA-03S
Shallow
5.8
<0.5
0.05
64.5
<0.1
<50
<0.08
9
0.23
1.2
0.15
104
<2.5
10.2
1.7
<0.5
109
<1
<0.1
101
0.44
GWA-06D
Transition Zone
7.0
<0.5
2.0
19.5
<0.1
<50
<0.08
4.9
<0.025
0.69
1.2
1,570
7.6
514
5.1
<0.5
120
17.3
<0.1
<250
0.24
GWA-06S
Shallow
5.1
<0.5
0.15
124
1.6
37.6
0.62
8.6
0.89
3.4
0.52
260
3.6
250
0.7
<0.5
34.3
14.1
0.26
<250
0.47
GWA-07D
Transition Zone
7.5
0.78
1.1
14.5
<0.1
<50
<0.08
23.0
0.71
1.1
0.056
100
26.7
<5
8.6
<0.5
251
2.2
<0.1
<250
2.5
GWA-07SA
Shallow
4.8
<0.5
<0.1
189
3.2
69.3
0.13
23.8
1.1
2.0
12.7
357
4.2
261
<0.5
<0.5
37.8
18.4
0.084
<250
0.68
GWA-08D
Transition Zone
6.9
<0.5
1 0.29
6.5
<0.1
<50
<0.08
5.5
0.059
0.63
0.10
122
13.1
37.4
4.6
<0.5
59.1
11.9
<0.1
126
0.81
GWA-08S
Shallow
5.4
<0.5
0.12
53.1
1 0.79
210
0.10
2.8
0.11
0.69
0.16
237
1.1
37.0
<0.5
11.2
230
55.9
<0.1
141
0.48
GWA-09BR
Bedrock
6.6
<0.5
0.26
<5
<0.1
223
<0.08
57.0
0.22
1.8
0.26
1 128
18.3
135
1.7
<0.5
89.3
2.4
1 <0.1
<250
0.72
GWA-09D
Transition Zone
6.2
0.30
0.25
9.8
<0.1
<50
<0.08
43.2
0.058
3.1
1.1
126
12.9
17.1
2.7
<0.5
106
4.8
<0.1
1 <250
0.43
GWA-09S
Shallow
5.3
<0.5
0.47
83.5
0.45
<50
0.075
2.5
0.22
2.0
0.59
647
2.5
19.1
<0.5
<0.5
6.3
<1
0.14
49.5
0.74
GWA-22D
Transition Zone
8.9
<0.5
0.91
16.1
<0.1
<50
<0.08
10.9
0.23
0.72
<0.1
56.6
33.6
13.5
5.1
0.51
86.7
7.7
<0.1
146
5.3
GWA-22S
Shallow
5.9
<0.5
<0.1
<5
<0.1
<50
<0.08
2.2
0.31
1.1
0.15
<50
3.0
5.6
<0.5
<0.5
42.2
8.4
<0.1
64.4
1.2
GWA-25BR
Bedrock
8.4
<0.5
0.67
7.3
<0.1
<50
<0.08
2.3
0.034
0.95
<0.1
54.7
4.8
9.7
12.8
<0.5
48.2
23.1
<0.1
134
<0.3
GWA-26BR
Bedrock
7.7
<0.5
0.60
12.9
<0.1
<50
<0.08
10.0
0.026
1.0
2.9
228
2.2
104
11.3
<0.5
46.2
3.8
<0.1
<250
0.71
GWA-26D
Transition Zone
5.6
<0.5
<0.1
41.9
0.17
<50
0.19
10.2
0.076
0.76
0.100
140
1 2.3
17.4
0.58
<0.5
30.3
1 0.77
<0.1
<250
0.17
GWA-26S
Shallow
5.5
<0.5
<0.1
39.3
0.14
<50
<0.08
6.5
0.057
0.54
<0.1
101
2.6
13.0
<0.5
<0.5
16.2
0.54
<0.1
<250
0.19
LRB-01BR
Bedrock
7.4
<0.5
0.34
5.5
<0.1
<50
<0.08
1.8
0.17
0.51
0.38
70.2
15.4
120
1.1
<0.5
46.1
1.4
1 <0.1
105
4.1
LRB-01D
Transition Zone
6.4
<0.5
0.11
20.8
<0.1
<50
<0.08
2.4
22.3
15.0
<0.1
<50
3.0
<5
<0.5
0.61
67.3
21.6
<0.1
128
6
LRB-01S
Shallow
6.3
<0.5
0.13
73.2
<0.1
<50
<0.08
1.1
8.0
7.9
0.44
196
1.0
23.3
0.29
<0.5
73.1
<1
<0.1
100
2.8
LRB-02BR
Bedrock
7.0
<0.5
1 0.091
4.6
<0.1
<50
<0.08
4.2
0.083
<0.5
<0.1
<50
14.5
21.1
2
<0.5
106
2.2
<0.1
156
M1.5
LRB-02D
Transition Zone
6.2
<0.5
0.10
15.3
<0.1
<50
<0.08
6.2
0.14
0.73
1.4
59.4
6.8
10.1
0.88
<0.5
149
1.2
<0.1
135
1.1
LRB-02S
Shallow
5.8
<0.5
0.053
82.1
1 0.083
<50
<0.08
13.8
0.15
0.90
0.27
116
<2.5
59.9
<0.5
<0.5
80.1
<1
<0.1
119
0.32
MW-01
Shallow
5.2
20.5
0.11
<50
2.2
0.65
1.0
263
34.0
0.57
0.14
<25
MW-01D
Bedrock
6.5
3.5
0.028
<50
8.1
0.83
0.72
28.0
28.1
0.86
0.11
76.3
0.51
MW-02
Shallow
5.9
0.37
-
73.4
0.36
60.3
-
3.7
-
2.4
0.36
724
-
31.9
-
-
-
0.41
0.16
60.5
0.81
MW-03
Shallow
5.6
<0.5
0.22
54.4
0.17
<50
<0.08
7.5
1.5
4.2
0.19
127
1.8
8.0
<0.5
<0.5
34.3
1.0
<0.1
44.7
0.65
MW-04
Shallow
5.9
<0.5
0.10
3.9
<0.1
746
<0.08
2.7
10.7
13.3
0.23
432
<2.5
8.5
<0.5
15.5
76.1
80.7
0.10
183
2.6
MW-05
Shallow
5.6
0.59
32.3
0.22
<50
2.1
0.77
199
6.1
0.083
35.0
0.58
MW-06
Shallow
5.7
-
62.8
0.68
<50
7.8
0.28
-
54.7
-
2.4
-
<0.1
54.7
0.35
MW-07
Shallow
5.5
34.1
0.30
1309
6.2
0.77
111
9.8
13.4
89.9
173
0.40
MW-104BRA
Bedrock
7.9
0.27
1.4
22
<0.1
<50
<0.08
3.6
0.27
23.9
0.57
186
4.8
38.8
10.5
<0.5
291
9.5
<0.1
1 135
6.5
MW-104D
Transition Zone
6.9
<0.5
0.12
5.6
<0.1
<50
<0.08
1.2
0.89
1.8
0.057
167
5.2
8.2
2.9
1 <0.5
73.8
1.0
<0.1
109
4.2
MW-104S
Shallow
5.4
<0.5
<0.1
67.7
0.15
<50
<0.08
0.94
1.4
3.9
0.12
139
0.9
8.4
1.3
<0.5
28.4
<1
<0.1
42.3
0.32
MW-203BR
Bedrock
6.7
<0.5
0.12
<5
<0.1
<50
<0.08
9.8
0.74
1.8
0.05
89.7
11.7
6.1
2.3
<0.5
48.6
2.1
<0.1
117
2.7
MW-203D
Transition Zone
6.6
<0.5
0.11
8.7
<0.1
<50
<0.08
3.6
1.5
1.8
<0.1
89.4
9.6
6.8
<0.5
34.7
1.0
<0.1
94.8
3.4
MW-203S
Shallow
5.6
1 <0.5
I <0.1
48.8
0.17
1 <50
1 <0.08
1 1.4
1 0.30
1.1
<0.1
<50
0.8
1 <5
<0.5
<0.5
19.7
<1
<0.1
1 35.4
<0.3
Page 2 of 4

TABLE 6-5
MEANS OF GROUNDWATER COIs - JANUARY 2018 TO APRIL 2019
CORRECTIVE ACTIVE PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Analytical Parameter
pH
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chloride
Chromium (VI)
Chromium
Cobalt
Iron
Lithium
Manganese
Molybdenum
Selenium
Strontium
Sulfate
Thallium
Total
Dissolved
Solids
Vanadium
Reporting Units
S.U.
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
mg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
mg/L
pg/L
mg/L
pg/L
15A NCAC 02L Standard
6.5-8.5
1*
10
700
4*
700
2
250
NE
10
1*
300
NE
50
NE
20
NE
250
0.2*
500
0.3*
2018 Background Threshold Values (Shallow Flow Zone)'
5.1-6.0
1
1
58
1 0.362
50
1
15
1.75
4.72
0.509
750
NE
22.9
1
0.5
56.5
1.93
0.2
85
1.33
2019 Background Threshold Values (Shallow Flow Zone)Z
5.2-6.0
1
1
123
0.3
50
1
19
4
11
0.6
1600
2
40
0.5
1
46
2.043
0.2
93
3
2019 Background Dataset Range (Shallow Flow Zone)Z
5.3-5.9
0.1-1.1
0.04-1
19-124
0.03-0.6
2.5-50
0.03-1.0
1.2-18.8
0.2-2.7
0.5-11.7
0.02-1.3
22-11,100
0.39-2
3-189
0.1-1.3
0.1-1.4
7.9-48
0.1-2.4
0.02-0.2
20-90
0.1-6.4
2018 Background Threshold Values (Deep Flow Zone)'
5.2-7.0
1
1
12.6
0.219
50
1
20.9
0.411
3.3
1.6
240
NE
13
1
0.5
68.5
6.35
0.2
148
1.45
2019 Background Threshold Values (Deep Flow Zone)Z
5.6-7.0
1
1
16
0.1
50
0.08
19
0.6
3
2
226
95
57
2
0.5
73
8.447
0.1
134
2
2019 Background Dataset Range (Deep Flow Zone)Z
5.6-7.0
0.1-1.5
0.05-1.1
0.004-0.2
0.01-0.02
11.9-58.8
0.03-0.2
2.0-20.3
0.03-0.5
0.1-5.0
0.02-1.8
13-850
2.2-52.2
2.5-104
0.1-5.3
0.2-3.7
29.3-87.8
0.5-11
0.02-0.1
25-126
0.1-1.4
2018 Background Threshold Values (Bedrock Flow Zone)'
6.2-8.4
0.5
0.51
6.2
0.2
50
0.08
3
0.33
5.3
0.76
228
NE
9.9
3.7
0.5
100
9.6
0.1
133
0.82
2019 Background Threshold Values (Bedrock Flow Zone)Z
6.3-6.5
1
2
11
0.2
50
0.08
3
0.4
11
0.8
341
30
64
6
0.5
99
15.4
0.1
181
2
2019 Background Threshold Values (Bedrock Flow Zone)Z
6.2-8.4
0.1-1.4
0.1-1.5
3.0-11
0.01-0.2
33.3-50
0.03-0.1
2.3-3.2
0.03-0.3
0.5-34.7
0.03-0.8
27-228
3.9-30
3.9-87.1
0.5-3.7
0.4-0.5
32.6-100
2.5-22.5
0.1-0.1
52-250
0.2-2.3
Sample ID Flow Zone
Mean, Geomean, or Median Result3
Upgradient or the Ash Basin Continued
MW2-07
Transition Zone
5.2
0.33
19.7
2.35
1 13,600
1 0.59
10.1
0.22
0.44
18.8
298
120
681
1,123
0.46
MW2-09
Transition Zone
6.1
0.35
59.4
0.023
292
3.5
1.6
1 1.0
1 564
1
1 288
1
1 0.60
1 32.1
1 0.10
1 141
1 0.80
OB-05
Shallow
5.3
0.51
1 113
1 0.52
1 <50
3.8
1.3
1 0.32
1 687
1
1 34.7
0.079
0.12
<25
1 1.3
OB-09
Transition Zone
5.1
0.71
1 13.6
1 2.0
26 233
1 1.7
1 9.9
1.1
0.36
I 26.8
I
1 079
277
955
1 493
1 54
Downgradient of the Ash Basin
CCR-13BR
Bedrock
7.6
0.41
1.7
10
<0.1
<50
<0.08
22
0.21
2.5
0.18
107
30
31
9.4
<0.5
133
87
<0.1
300
1.5
CCR-13D
Transition Zone
6.0
<0.5
0.72
13
0.13
<50
<0.08
14
<0.025
0.58
2.8
70
4.8
92
0.20
<0.5
52
13
0.077
73
<0.3
CCR-13S
Shallow
5.6
<0.5
0.12
14
0.23
<50
<0.08
13
0.074
<0.5
0.78
134
4.2
34
<0.5
<0.5
44
0.78
0.076
54
0.33
GWA-01BR
Bedrock
10.0
0.26
0.34
5.9
<0.1
<50
<0.08
2.4
<0.025
2.4
0.15
153
64
9.1
7.3
<0.5
75
6.4
<0.1
110
0.28
GWA-0113
Transition Zone
6.1
0.70
0.99
9.7
<0.1
<50
<0.08
89
0.040
4.8
9.0
198
36
40
6.4
<0.5
120
4.2
0.053
233
0.63
GWA-01S
Shallow
4.7
0.44
0.22
192
4.5
633
0.16
55
0.17
0.87
3.7
186
it
131
0.4
0.4
68
0.99
0.25
102
0.25
GWA-02D
Transition Zone
6.2
<0.5
3.3
<5
0.072
<50
<0.08
1.8
0.16
2.4
0.31
73.5
29
12
0.62
<0.5
24
0.82
<0.1
55
0.30
GWA-02S
Shallow
5.3
<0.5
0.69
17
1 0.21
<50
<0.08
1 1.5
0.078
0.63
0.33
553
4.7
16
<0.5
<0.5
3.2
<1
0.082
<25
0.29
GWA-10DA
Transition Zone
7.7
<0.5
2.4
10
<0.1
<50
<0.08
8.4
0.22
1.1
0.24
243
1 45
12
0.33
<0.5
90
9.0
<0.1
1 128
0.63
GWA-10S
Shallow
4.0
<0.5
5.5
583
0.91
327
0.45
116
0.026
1.2
14
153
5.0
2 753
<0.5
3.3
46
<1
0.24
200
0.32
GWA-11D
Transition Zone
6.0
<0.5
3.0
17
0.56
419
<0.08
251
<0.025
4.6
3.4
3,743
117
153
0.56
<0.5
538
4.2
<0.1
553
0.38
GWA-11S
Shallow
4.6
<0.5
1.9
547
11
1338
0.81
203
0.032
2.4
10
377
33
162
<0.5
1.4
432
<1
0.38
415
0.44
GWA-16BR
Bedrock
9.6
0.91
1.7
8.1
<0.1
<50
<0.08
0.95
0.079
0.64
<0.1
50
17
<5
1.6
<0.5
136
14
<0.1
130
0.54
GWA-16DA
Transition Zone
6.5
<0.5
0.11
5.7
<0.1
1 <50
<0.08
0.99
0.051
0.80
0.92
1,972
4.3
19
0.63
<0.5
42
8.5
<0.1
<250
<0.3
GWA-16S
Shallow
5.0
<0.5
<0.1
38
0.10
<50
<0.08
0.78
0.25
0.58
1.2
65
2.0
50
<0.5
<0.5
7.1
<1
<0.1
34
<0.3
GWA-17D
Transition Zone
6.9
<0.5
0.11
8.1
<0.1
51
<0.08
1.1
<0.025
1.3
0.31
2,090
1.0
43
0.47
<0.5
41
12
<0.1
100
0.34
GWA-17S
Shallow
5.3
<0.5
0.12
52
<0.1
55
0.079
1.1
0.037
0.66
11
237
1 2.4
167
<0.5
<0.5
1 10
19
<0.1
1 52
0.33
GWA-18D
Transition Zone
6.4
<0.5
0.56
<5
<0.1
<50
<0.08
21
1.4
1.7
0.12
<50
12
30
0.86
<0.5
62
6.4
<0.1
<250
0.49
GWA-18SA
Shallow
4.4
<0.5
2.6
644
5.9
693
0.94
145
0.026
1.1
89
188
36
1937
<0.5
1.3
138
<1
1.2
<250
<0.3
GWA-19BR
Bedrock
10.4
0.77
0.32
7.9
<0.1
<50
<0.08
1.3
0.10
1.1
<0.1
53
57
<5
2.3
<0.5
51
14
<0.1
136
0.19
GWA-19D
Transition Zone
7.2
<0.5
15
6.3
1 <0.1
<50
<0.08
3.6
0.043
<0.5
0.33
2,449
60
87
1.2
<0.5
80
13
<0.1
<250
0.20
GWA-19SA
Shallow
4.7
<0.5
6.1
686
9.5
2,225
0.82
191
0.030
1.2
48
137
20
2,033
<0.5
5.9
153
<1
0.48
331
<0.3
GWA-20BR
Bedrock
9.6
0.67
30
<5
<0.1
63
<0.08
27
0.047
1.7
<0.1
92
93
6.6
50
<0.5
55
15
<0.1
<250
0.43
GWA-20D
Transition Zone
5.2
<0.5
4.1
42
1.5
9,690
1 1.9
425
0.030
1.1
2.9
54
63
1,987
<0.5
<0.5
863
68
0.2
885
<0.3
GWA-20SA
Shallow
5.1
<0.5
3.0
198
5.8
11,176
1 1.1
415
0.050
0.92
17
148
18
5,000
<0.5
0.70
494
87
1 0.44
919
<0.3
GWA-21D
Transition Zone
5.1
0.5
0.23
220
5.0
507
0.96
238
0.03
0.68
0.9
47
17
48
0.5
0.45
643
1
0.29
468
0.23
GWA-21S
Shallow
4.7
<0.5
1.8
400
9.9
364
0.7
137
0.036
1.1
20
101
15
208
<0.5
1.3
194
1.9
0.27
247
<0.3
GWA-24BR
Bedrock
7.7
1 <0.5
2.3
<5
<0.1
<50
<0.08
2.0
0.034
2.1
0.17
227
29
15
3.7
<0.5
108
5.3
<0.1
144
0.35
GWA-24D
Transition Zone
5.4
0.58
<0.1
9.5
1 0.16
<50
0.089
56
0.16
4.0
0.22
105
1.8
13
0.59
<0.5
110
1.6
<0.1
157
<0.3
GWA-24S
Shallow
5.8
-
-
-
-
<50
-
-
-
-
-
-
-
-
-
-
-
1.1
-
105
-
GWA-27BR
Bedrock
11.5
-
-
-
-
<50
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
GWA-27D
Transition Zone
5.1
<0.5
2.5
91
3.2
7,663
1.9
431
0.079
0.72
9.6
<50
1 58
2 810
0.4
0.42
1 833
23
0.37
1 834
<0.3
GWA-27S
Shallow
4.6
<0.5
2.4
111
1.6
533
0.25
47
0.035
1.3
41
228
13
884
<0.5
1.3
38
4.1
0.25
154
<0.3
GWA-30D
Transition Zone
7.4
<0.5
1.3
31
<0.1
<50
<0.08
4.3
0.14
<0.5
0.087
<50
25
70
3.2
<0.5
70
1.0
<0.1
116
0.58
GWA-30S
Shallow
5.1
<0.5
0.34
18
0.54
<50
<0.08
5.2
0.042
<0.5
1.4
58
7.9
19
<0.5
<0.5
35
<1
<0.1
46
<0.3
GWA-31D
Transition Zone
7.4
<0.5
1 0.28
4.2
0.16
<50
<0.08
2.3
1 <0.025
0.73
<0.1
819
26.2
33
0.34
<0.5
54
5.5
<0.1
104
<0.3
GWA-31S
Shallow
5.5
<0.5
0.23
17
1 0.37
<50
<0.08
2.7
0.057
1.1
0.19
304
2.3
9.7
<0.5
<0.5
13
<1
<0.1
31
1 0.40
GWA-32D
Transition Zone
8.0
0.56
0.49
9.7
<0.1
42
<0.08
71
0.073
0.80
0.050
1,004
64
213
1.4
<0.5
145
48
<0.1
356
<0.3
GWA-32S
Shallow
6.3
<0.5
53
27
0.24
87
<0.08
50
0.034
1.2
58
34,820
1
9,180
0.67
<0.5
6.4
<1
0.70
128
<0.3
MW-200BR
Bedrock
7.3
<0.5
1.3
<5
0.21
156
<0.08
62
<0.025
<0.5
0.08
237
42
132
0.43
<0.5
1 191
6.5
<0.1
273
<0.3
MW-200D
Transition Zone
6.1
<0.5
0.79
<5
0.077
159
<0.08
39
0.10
0.54
0.064
56
13
13
0.29
<0.5
113
3.2
<0.1
156
<0.3
MW-200S
Shallow
1 5.6
<0.5
1.6
48
0.32
62
<0.08
26
0.063
1 1.3
1 4.0
953
1.7
1 123
1 <0.5
<0.5
55
6.4
<0.1
107
0.67
MW-201BR
Bedrock
7.6
0.54
0.46
<5
<0.1
<50
<0.08
5.0
0.080
0.85
0.054
63
14
44
11
<0.5
40
8.1
<0.1
127
0.32
MW-201D
Transition Zone
6.1
<0.5
0.064
<5
<0.1
<50
<0.08
4.9
3.1
4.0
0.043
64
4.5
6.4
0.47
<0.5
62
1.1
<0.1
99
1.3
MW-204D
Transition Zone
5.6
<0.5
<0.1
45
<0.1
<50
<0.08
1.9
0.098
<0.5
26
104
1.8
38
<0.5
<0.5
15
4.9
0.068
<250
0.39
MW-204S
Shallow
5.6
<0.5
0.17
253
0.069
<50
0.15
2.9
<0.025
0.68
14
4 221
2.6
503
<0.5
<0.5
21
2.4
6.12
<250
0.43
Page 3 of 4

TABLE 6-5
MEANS OF GROUNDWATER COIs - JANUARY 2018 TO APRIL 2019
CORRECTIVE ACTIVE PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Analytical Parameter
pH
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chloride
Chromium (VI)
Chromium
Cobalt
Iron
Lithium
Manganese
Molybdenum
Selenium
Strontium
Sulfate
Thallium
Total
Dissolved
Solids
Vanadium
Reporting Units
S.U.
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
mg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
pg/L
mg/L
pg/L
mg/L
pg/L
15A NCAC 02L Standard
6.5-8.5
1*
10
700
4*
700
2
250
NE
10
1*
300
NE
50
NE
20
NE
250
0.2*
500
0.3*
2018 Background Threshold Values (Shallow Flow Zone)'
5.1-6.0
1 1
1
58
1 0.362
50
1
15
1.75
4.72
0.509
1 750
NE
22.9
1
0.5
56.5
1.93
1 0.2
85
1.33
2019 Background Threshold Values (Shallow Flow Zone)2
5.2-6.0
1
1
123
0.3
50
1
19
4
11
0.6
1600
2
40
0.5
1
46
2.043
0.2
93
3
2019 Background Dataset Range (Shallow Flow Zone)2
5.3-5.9
0.1-1.1
0.04-1
19-124
0.03-0.6
2.5-50
0.03-1.0
1.2-18.8
0.2-2.7
0.5-11.7
0.02-1.3
22-11,100
0.39-2
3-189
0.1-1.3
0.1-1.4
7.9-48
0.1-2.4
0.02-0.2
20-90
0.1-6.4
2018 Background Threshold Values (Deep Flow Zone)'
5.2-7.0
1
1
12.6
0.219
50
1
20.9
0.411
3.3
1.6
240
NE
13
1
0.5
68.5
6.35
0.2
148
1.45
2019 Background Threshold Values (Deep Flow Zone)2
5.6-7.0
1
1
16
0.1
50
0.08
19
0.6
3
2
226
95
57
2
0.5
73
8.447
0.1
134
2
2019 Background Dataset Range (Deep Flow Zone)2
5.6-7.0
0.1-1.5
0.05-1.1
0.004-0.2
0.01-0.02
11.9-58.8
0.03-0.2
2.0-20.3
0.03-0.5
0.1-5.0
0.02-1.8
13-850
2.2-52.2
2.5-104
0.1-5.3
0.2-3.7
29.3-87.8
0.5-11
0.02-0.1
25-126
0.1-1.4
2018 Background Threshold Values (Bedrock Flow Zone)'
6.2-8.4
0.5
0.51
6.2
0.2
50
0.08
3
0.33
5.3
0.76
228
NE
9.9
3.7
0.5
100
9.6
0.1
133
0.82
2019 Background Threshold Values (Bedrock Flow Zone)2
6.3-6.5
1
2
11
0.2
50
0.08
3
0.4
11
0.8
341
30
64
6
0.5
99
15.4
0.1
181
2
2019 Background Threshold Values (Bedrock Flow Zone)2
6.2-8.4
0.1-1.4
0.1-1.5
3.0-11
0.01-0.2
33.3-50
0.03-0.1
2.3-3.2
0.03-0.3
0.5-34.7
0.03-0.8
27-228
3.9-30
3.9-87.1
0.5-3.7
0.4-0.5
32.6-100
2.5-22.5
0.1-0.1
52-250
0.2-2.3
Sample ID Flow Zone
Mean, Geomean, or Median Result3
IMP Extraction System
EX-01
Transition Zone
5.3
1.1
2.8
102
4.3
9,877
1.6
412
0.071
1.9
10
121
38
3,940
0.30
<0.5
853
69
0.37
893
<0.3
EX-02
Transition Zone
5.0
<0.5
3.0
146
7.1
10,157
1.5
538
0.18
4.5
17
<50
24
3,843
0.30
0.71
592
116
0.37
922
<0.3
EX-03
Transition Zone
5.2
<0.5
3.2
210
2.7
9,663
0.48
540
0.078
0.55
43
28
12
4,523
0.22
1.3
507
112
0.63
958
<0.3
EX-04
Transition Zone
5.2
<0.5
2.5
259
1.9
9,897
0.47
461
0.13
0.69
81
26
13
6,073
0.22
1.3
475
76
0.60
998
<0.3
EX-05
Transition Zone
5.3
<0.5
3.0
229
0.86
10,083
0.37
450
0.069
0.82
100
36
10
5,060
0.14
1.9
492
118
0.74
980
<0.3
EX-06
Transition Zone
5.5
<0.5
1.1
278
1.2
9,983
0.84
463
0.078
0.97
124
<50
16
7,313
<0.5
0.73
709
74
0.86
984
<0.3
EX-07
Transition Zone
5.3
<0.5
1.7
192
1.5
6,140
0.86
329
0.069
1.0
57
86
32
3,510
0.12
0.36
711
24
0.59
705
<0.3
EX-08
Transition Zone
5.2
<0.1
0.63
371
1.8
2 790
0.80
235
0.100
<0.5
9.7
<50
24
1 570
<0.5
<0.5
534
1.9
0.76
464
<0.3
EX-09
Transition Zone
5.1
0.97
471
2.4
2 600
1.1
285
0.073
7.0
153
43
1 365
795
0.97
0.56
595
<0.3
EX-10
Transition Zone
1 5.6
<0.5
1 1.0
1 7.5
1 1.3
1 3,970
0.38
1 264
1 0.038
1 4.3
7.3
31
1 125
1 1,450
1 0.29
1 <0.5
1 553
1 3.3
1 0.095
1 569
<0.3
Prepares by: ALA/LWU CneCxeg by: DAA/MUK
Notes:
' - Background threshold values were calculated using data from background groundwater samples collected June 2015 to April 2017
z - Background threshold values were calculated using data from background groundwater samples collected October 2010 to December 2018 and sumbmitted to NCDEQ June 2019
3 - Statistical mean, geomean, or median calculated from data ranging from January 2018 to April 2019. Ash pore water results are not compared to groundwater standards or criteria.
4 - Background groundwater results are not compared to compartive criteria. Background concentrations greater than background threshold values are within background dataset ranges or piedmont setting background ranges. Groundwater flow directions across the Site indicate all approved background locations are representative of naturally occuring conditions.
Mean or geomean results were used based on the central tendency of the data set. Median results were used for total radium only.
For wells with datasets containing fewer than four valid results, the most recent valid sample data was used.
Means were calculated for wells with four or more valid sample results. Sample results were excluded from calculations:
1) if turbidity > 10 NTU (for COIs other than boron)
2) for unusable data (RO qualified)
3) if a result was non -detect at a reporting limit (RL) greater than the normal laboratory RL
Bold text - greatest comparative value
O - bold highlighted concentration indicates value is greater than applicable regulatory standarad (02L or IMAC)
O - bold highlighted concentration indicates value is greater than greatest background threshold value where there is no regulatory standard, or background threshold values are greater than regulatory standard
O - highlighted concentration indicates value is within range of background threshold values for constituents where there is no regulatory standard, or background threshold values are greater than regulatory standard
* - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013.
< - concentration not detected at or above the adjusted reporting limit.
-' - no available data to conduct mean analysis
NE - not established
mg/L - Milligrams per liter
pq/L - Micrograms per liter
S.U. Standard unit
Page 4 of 4

TABLE 6-6
COI MANAGEMENT MATRIX
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINA, LLC, BELEWS CREEK, NC
Constituent Standards and Values - 02L Criterion Lines of Evidence (LOE) - 02L Criterion
Rationale - 02L Criterion
Single location with mean greater than 02L at or beyond the compliance boundary. Does not exhibit a discernable plume and Is
Shallow
1
1
52.54
5.25
1
GWA-32S
9
9
1
Y
not within the 02L boron plume footprint. Location is adjacent to a wetland; reducing conditions may enhance constituent
solubility. No means of constituent greater than 02L in deep Flow zone at this location.
Transition Zone
1
t
14.56
1.46
1
GWA-19D y
i
6
1
y
Single location with mean greater than background value at or beyond the compliance boundary. Does not exhibit a discemable
plume but Is within the 02L boron plume footprint.
arsenic
µg/L
10
0.04-1.5
0.04 - 1.5
0.1 - 6.35
Non -conservative
Single location with mean greater than background value at or beyond the compliance boundary. Does not exhibit a discernable
Betlrock
1
2
30.42
3.04
1
GWA-20BR-
3
3
1
V
plume but is within the 02L boron plume. Bedrock location exhibits slightly alkaline pH conditions which may enhance constituent
solubility.
Shallow
58
123
685.50
0.98
0
6
6
0
N
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.
Transition Zone
13
16
220.83
0.32
0
N
15
0
0
N
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.
Barium
µg/L
700
0.004-124
0.004 - 124
11 - 840
Non -Conservative
Bedrock
6
11
10.35
0.01
0
0
0
0
N
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.
Shallow Zone
50
50
11176
15.97
4
GWS-1S, GWA-11S, GWA-19SA, GWA-20SA
9
9
7
V
Mulitple locations with means greater than 02L at or beyond the compliance boundary and which exhibit a discernable plume.
Transition zone
50
50
9690
13.84
2
4
4
3
y
Mulitple locations with means greater than 02L at or beyond the compliance boundary and which exhibit a discernable plume.
Boron
µg/L
700
2.5-58.8
2.5 - 58.8
49.09 - 176.8
GWA-2013, GWA-27D V
Conservative
Bedrock zone
50
5o
156
0.22
0
2
2
0
N
No means greater than 02L at or beyond the compliance boundary, however, flow and transport modeling predicts 02L plume
migration at or beyond the compliance boundary.
Shallow Zone
1
1
1.10
0.55
0
1
1
1
N
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.
Transition Zone
1
0.08
1.92
0.96
0
N
2
2
2
N
No means greater than 02L at or beyond the Compliance boundary. Does not warrant Corrective action.
Cadmium
µg/L
2
0.03-1.0
0.03 - 1.0
0.06 - 1
Non -Conservative
Bedrock Zone
0,8
0.D8
<0.08
NA
0
0
0
0
N
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.
Shallow zone
15
19
415
1.66
1
GWA-20SA
9
9
1
y
Single location with mean greater than background value at or beyond the compliance boundary. Does not exhibit a discernable
plume but is within the 02L boron plume footprint.
Transition Zone
21
19
431
1.72
3
GWA-IID, GWA-20D, GWA-27D Y
8
8
3
V
Mulitple locations with means greater than 02L at or beyond the compliance boundary and which exhibit a discernable plume.
chloride
mg/L
250
1.2-20.3
1.2 - 20.3
3 - 250
conservative
Bedrock Zone
3
3
62
0.25
0
4
3
0
N
No means greater than 02L at or beyond the compliance boundary, however, flow and transport modeling predicts 02L plume
migration at or beyond the compliance boundary.
Shallow Zone
5
11
2
0.22
0
0
0
0
N
No means greater than background value at or beyond the compliance boundary. Does not warrant corrective action.
Transition Zone
3
3
5
0.48
0
N
0
0
0
N
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.
Chromium (Total)
µg/L
10
0.1-34.7
0.1 - 34.7
1 - 26
Non -Conservative
Bedrock Zone
5
11
2
0.22
0
0
0
0
N
No means greater than background value at or beyond the compliance boundary. Does not warrant corrective action.
Single location with mean greater than background value at or beyond the compliance boundary. Does not exhibit a discernable
Shallow Zone
750
1600
34820
21.76
1
GWA-32S
1
1
0
V
plume and is not within the 02L boron plume footprint. Location is adjacent to a wetland; reducing conditions may enhance
constituent solubility.
300
Iron
µg/L
(Deep Flaw
Transition Zone
24
226
13-11,100
13- 11,100
56.3 - 37,500
3743
12.48
4
GWA-111), GWA-1913, GWA-311), GWA-32D y
3
0
0
y
Variable
Mulitple locations with means greater than 02L at ar beyond the compliance boundary and which exhibit a discernable plume.
Zone only)
Bedrock Zone
228
341
237
0.70
0
1
0
0
N
No means greater than background value at or beyond the compliance boundary. Does not warrant corrective action.
Shallow Zone
23
40
9180
183.60
12
GWA-01S, GWA-10S, GWA-11S, GWA-16S, GWA37S, GWA-195A,
GWA-20SA, GWA-21S, GWA-27S, GWA-32S, MW-200S, MW-2045
7
7
1
V
Mulitple locations with means greater than 02L at or beyond the compliance boundary and which exhibit a discernable plume.
Manganese
µg/L
50
(Shallow Flow
Zone only)
2.5-189
2.5 - 189
7 - 9,170
CCR-13D, GWA-IID, GWA-19D, GWA-20D, GWA-27D,
GWA-30D, GWA-32D y
Variable
Transition Zone
13
57
2810
49.30
7
4
3
0
V
Mulitple locations with means greater than background value at or beyond the compliance boundary and which exhibit a
dible plume.
discernable
Bedrock zone
10
64
132
2.06
1
1
0
0
y
Single location with mean greater than background value at or beyond the compliance boundary. Does not exhibit a discernable
plume but is within the predicted 02L boron plume footprint.
MW-200BR
Shallow Zone
0.5
1
6
0.30
0
3
1
2
N
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.
Transition Zone
0.5
0.5
0
0.02
0
0
0
0
N
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.
Selenium
l,g/L
20
0.1-3.7
0.1 - 3.7
0.5-2
Variable
Bedrock zone
0.5
0.5
<0.5
NA
0
0
0
0
N
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.

TABLE 6-6
COI MANAGEMENT MATRIX
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINA, LLC, BELEWS CREEK, NC
Sulfate
mg/L
250
Shallow Zone 2
2
0.1-22.5
0.1 - 22.5
1.2 - 510
87
0.35
0
V
1 o N
3 0 N Variable
1 0 N
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.
3
Transition Zone
6
8
68
0.27
0
5
No means greater than 02L at or beyond the compliance boundary. Does not warrant corrective action.
Bedrock Zone
10
15
87
0.35
0
1
No means greater than 021- at or beyond the compliance boundary. Does not warrant corrective action.
Total Dissolved Solids
mg/L
500
Shallow Zone
85
93
20-250
20 - 250
50 - 1,200
919
1.84
1
GWA-20SA
y
10
3
0 y
Conservative
Single location with mean greater than background value at or beyond the compliance boundary. Does not exhibit a discernable
plume but is within the 02L boron plume footprint.
Transition Zone
148
134
885
1.77
3
GWA-11D, GWA-201), GWA-27D
10
4
0 V
Mulitple locations with means greater than 02L at or beyond the compliance boundary and which exhibit a discernable plume.
Bedrock Zone
133
181
300
0.60
0
2
2
0
No means greater than 02L at or beyond the compliance boundary, however, flow and transport modeling predicts 02L plume
migration at or beyond the compliance boundary.
Constituent Standards and Values - IMAC Criterion
Lines of Evidence (LOE) - IMAC Criterion
Rationale - IMAC Criterion
Antimony
µg/L
1
Shallow Zone
1
1
0.1-1.5
0.1 - 1.5
0.5 - 4.247
<0.5
NA
0
V
0
0
0
N
Conservative
No means greater than IMAC value at or beyond the compliance boundary. Does not warrant corrective action.
Transition Zone
1
1
1
0.70
0
1
o
0
N
No means greater than IMAC value at or beyond the compliance boundary. Does not warrant corrective action.
Bedrock Zone
1
1
1
0.77
0
1
o
0
N
No means greater than IMAC value at or beyond the compliance boundary. Does not warrant corrective action.
Beryllium
µg/L
4
Shallow Zone
0.4
0.3
0.01-0.6
0.01 - 0.6
0.053 - 1
11
2.74
5
GWA-01S, GWA-11S, GWA-19SA, GWA-20SA, GWA-21S
0
0
0
y
Non -Conservative
Mulitple locations with means greater IMAC value at or beyond the compliance boundary and which exhibit a discernable plume.
Transition Zone
0.2
0.1
5
1.24
1
GWA-21D
0
0
0
V
Single location with mean greater than background value at or beyond the compliance boundary. Does not exhibit a discernable
plume but is within the 02L boron plume footprint.
Bedrock Zone
0.2
0.2
0
0.05
0
o
0
0
N
No means greater than IMAC value at or beyond the compliance boundary. Does not warrant corrective action.
Cobalt
µg/L
1
Shallow Zone
0.5
0.6
0.02-1.8
0.02 - 1.8
0.2 - 88.85
58
58.00
13
GWA-01S, GWA-10S, GWA-11S, GWA-16S, GWA-17S, GWA-19SA,
GWA-20SA, GWA-21S, GWA-27S, GWA-30S, GWA-32S, MW-200S,
MW-2045
y
16
6
o
V
Variable
Mulitple locations with means greater than IMAC value at or beyond the compliance boundary and which exhibit a discernable
plume.
Transition Zone
2
2
25
12.30
6
CCR-13D, GWA-01D, GWA-11D, GWA-20D, GWA-2]D, MW-204D
5
0
0
V
Mulitple locations with means greater than background value at or beyond the compliance boundary and which exhibit a
discernable plume.
Bedrock Zone
0.8
0.6
0
0.18
0
0
c
0
N
No means greater than IMAC value at or beyond the compliance boundary. Does not warrant corrective action.
rhal6vm
µg/L
0.2
Shallow Zone
0.2
0.2
0.02-0.2
0.02 - 0.1
0.1-0.2
0.7
3.48
g
GWA-01S, GWA-10S, GWA-1IS, GWA-19SA, GWA-20SA,
GWA-21S, GWA-27S, GWA-325
y
o
o
0
y
variable
Mulitple locations with means greater than IMAC value at or beyond the compliance boundary and which exhibit a discernable
plume.
Transition Zone
0.2
0.1
0.4
1.87
2
GWA-21D, GWA-27D
o
0
o
V
Mulitple locations with means greater than IMAC value at or beyond the compliance boundary and which exhibit a discernable
plume.
Bedrock Zone
0.1
0.1
<0.1
NA
0
0
0
0
N
No means greater than IMAC value at or beyond the compliance boundary. Does not warrant corrective action.
vanadium
lic/L
0.3
Shallow Zone
1
3
0.1-6.4
0.1- 6.4
0.36 - 26
0.7
0.22
0
V
0
0
o
N
Non -Conservative
No means greater than background value at or beyond the compliance boundary. Does not warrant corrective action.
Transition Zone
1
2
1.3
0.63
0
0
0
0
N
No means greater than background value at or beyond the compliance boundary. Does not warrant corrective action.
Bedrock Zone
1
2
1.5
0.75
0
o
0
o
No means greater than background value at or beyond the compliance boundary. Does not warrant corrective action.
Constituent Standards and Values - Background Criterion
Lines of Evidence (LOE) - Background Criterion
Rationale - Background Criterion
chromium (Hexavalent)
µg/L
NE
Shallow Zone
2
4
0.03-2.7
0.03 - 2.7
0.03 - 12
0.2
0.04
0
N
5
5
0
N
Variable
No means greater than background value at or beyond the compliance boundary. Does not warrant corrective action.
Transition Zone
0.4
0.6
3.1
5.13
1
MW-201D
7
2
0
V
Single location with mean greater than background value at or beyond the compliance boundary. Does not exhibit a discernable
plume and is not within the 02L boron plume footprint.
Bedrock Zone
0.3
0.4
0.2
0.52
0
2
g
0
N
No means greater than background value at or beyond the compliance boundary. Does not warrant corrective action.

TABLE 6-6
COI MANAGEMENT MATRIX
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINA, LLC, BELEWS CREEK, NC
Constituents of Interest
201J CSA U tlate
P )
Reporting
po g
Unit
02L or IMAC
Criterion
Groundwater
Zone Statistically
Background Thresholtl
Derivetl Back
Value'•a
Flow Zone
l9
Belews Creek
Steam Station
Flow Zone
Background
Dataset Range
Belews Creek
Steam Station
9roun
Background
net aset Range
Piedmont
Background
groan
Value Range
maximum
Mean
Concentration
Yon
at or Beyond
Compliance
Boundary
Groundwater
Exceedance
Rat"'
Number of Wells
Greater Than
Com
Comparative
Criteria At or
Beyond Compliance
Boundary
ao°
M1°
Groundwater Monitoring Wells With COI Concentration Greater a
g Qde' a
Than Comparative Criteria
Para ive °Pyr to
aFx at°°
�:•'�`
Fe x
a ° N�
lTQ '
F cv 'L`
c
0� O
E
�a �qao a
b
pT ¢c, p
Q PQ
3 °,S aF°
ayv JQp°
E Q�
G°
`a°°
° c0
JQ
;
4
c°p5 �a ( Rationale for Selection of COIs for Corrective Action Evaluation
`Eati ) gr P
o (constituents where no means are greater than comparative criteria
� o I P PP
n all flow iOn¢s and/or multiple lines Of evidence support that <OnsLILU¢nt OC<DYrent¢s
a `s are not related to the source area, no corrective action is warranted)
Ve
locations with means greater than background value at or beyond the compliance boundary and ,
®®©
®®®
MEMOMulitiple
Transiti.n �onc
ME
plume but is within the 02L boron plume footprint
Mulitiple locations with means greater than background value at or beyond the compliance boundary and which exhibit a
Bedrock Zone
NONNI
ENMEN
CCR--.R, CiVIA4.Bl-, GW-213.1-, MW-2 ... I
cl_r nal,le plume. leveral bedrock locations exhibit slightly alkaline I conditions which may enhance constituent -lub! iity.
Remaining bedrock wells am within the 02L boron plume footprint.
plume and is not within the 02L boron plume footprint.
MEN
MIMMIN
ME
MO
Molybdenum
plume and are not within the 02L boron plume footprint.
=00
MM0
MOOD
WAl 3WAl .--2.-,
Mulitiple locations with means greater than background value at or beyond the compliance boundary and which exhibit a
ME
MMEN
GWA21SMW200S
discerrable plume.
®■■
00M
®MOM
M.1itiple locations with means gre.ter than background value at or beyond the compliance boundary and which exhibit a
di—rinable plume.
MMENCCR-�M'.WA-A.'
G---.R,.W-2 ... R
Vilulitiple locations with mean. greater than background value at or beyond the compliance boundary and which exhibit a
=MEN
Prepared by: DAA Checked by: ALA
Real
� - 0.e erence Crirenen
o - Evidence appppw= inelpaipn
� - Eeeenee eppporca «dpnpn
nai u n1la re ettz a C01 Bt daliffie,1in ffie 2017 CSA Update (sy—rm, 201]), -, the atldift onithl—
ackground t1--ltl values were calculatetl using tlare hom backgrountl grountlwatar samples coH—d 3une 201E re April 2017
3- Ux_d background MresM1old values are in the thiN wlumn and were calculated using tlata from backgrountl groundwater samples.11—d October 2010 to December 2018 antl sumbmittM W NCDEQ]une 2019
- Bedrock well [ha[ exM1lEl[s sIIgM1[ly alkllne pH (e10 S.U.) water gualiry. SIIgMIy alkaline wntli[ipnz appear localizetl and unchamcterlstic of betlrock flaw zone and mlgM1[ be attributable [p well Inztallatlon aRivi[les.
30 wells were usetl in tM1e evaluation, inclutling: CCR-1360., CC0.-13D, CC0.-13g,GWA-S1D,GWA-115,GWA-1680.,GWA-S6DA,GWA-169,GWA-1]D,GWA-1]s,GWA-1980.,GWA-19D, GWA-195A, GWA-180., G WA-1D,
49/L-mcro rams er liter
mg/L- milligrams per Ilrer
—Applicable
NE
No[ B[ablisM1etl
.. w d-4nita

Wells Within the Waste Boundary
Well ID
Boron
Chloride
Lithium
Total
Dissolved
Solids
Ash Pore Water Wells
S
NE
NE
NE
E
S
S
D
NE
AB-06SL
D
D
S
S
S
AB-07S
AB-08S
S
AB-08SL
S
S
Shallow Flow Zone
AB-01S
S
S
S
S
AB-02S
D
D
ND
D
AB-03S
D
D
S
D
AB-04SAP
D
S
S
S
AB-09S
ND
S
Deep Flow Zone
AB-01D
D
D
S
D
AB-02D
D
D
S
D
AB-03D
S
S
S
S
AB-04D
D
S
S
S
AB-05D
ND
S
S
S
AB-06D
ND
S
S
S
AB-07D
ND
D
S
AB-08D
ND
S
S
AB-09D
S
D
S
Bedrock Flow Zone
AB-01BR
S
S
S
S
AB-04BR
S
S
S
AB-04BRD
ND
D
S
AB-09BR
ND
D
S
AB-09BRD
NE
NE
NE
NE
TABLE 6-7
SUMMARY TREND ANALYSIS RESULTS
FOR MONITORING WELLS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Wells Between Waste Boundary
and Compliance Boundary
Well ID
Boron
Chloride
Lithium
Total
Dissolved
Solids
Shallow Flow Zone
CCR-01S
ND
CCR-02S
S
CCR-04S
S
D
D
CCR-05S
S
D
D
S
CCR-06S
CCR-07S
NE
D
NE
D
NE
S
NE
D
CCR-08S
CCR-09S
S
S
CCR-11S
ND
S
D
S
CCR-12S
ND
S
S
EXOB-01
C
D
S
S
EXOB-02
S
S
S
S
GWA-02S
ND
S
D
ND
GWA-18S
NE
NE
NE
NE
Deep Flow Zone
CCR-01D
ND
CCR-02D
S
S
D
CCR-04D
S
S
D
CCR-05D
D
S
S
S
CCR-06D
S
D
S
D
CCR-07D
S
S
CCR-08AD
S
D
D
D
CCR-08D
S
D
S
D
CCR-09D
S
S
CCR-11D
ND
D
CCR-12D
ND
NE
NE
NE
CCR-12DA
ND
D
S
GWA 62D
ND
S
S
S
GWA 18D
ND
S
S
Wells Downgradient of the Source Area
At or Beyond Compliance Boundary
Well ID
Boron
Chloride
Lithium
Total
Dissolved
Solids
Shallow Flow Zone
CCR-13S NE NE
NE NE
GWA-01S
S
GWA-10S
GWA-11S
S
D S
GWA-19SA S S
D D
GWA-20SA S D
D D
GWA-21S S
D S
GWA-24S NE NE
NE NE
GWA-27S
D
GWA-30S ND S
GWA-31S ND S
S
GWA-32S
S
MW-200S
Deep Flow Zone
lE
CCR-13D
NE
NE
NE
GWA-01D
ND
GWA lODA
ND
GWA-11D
S
S
GWA-19D
ND
S
S
S
GWA-20D
D
D
D
GWA-21D
S
S
GWA-24D
ND
S
S
GWA-27D
S
S
S
S
GWA-30D
ND
S
S
GWA-31D
ND
S
S
GWA-32D
S
S
S
MW-200D
D
D
S
D
MW-201D
ND
S
D
Bedrock Flow Zone
CCR-13BR
NE NE
NE
NE
GWA-01BR
ND S
NE
S
GWA-19BR
ND NE
NE
NE
GWA-20BR
S
S
S
GWA-24BR
ND S
S
S
GWA-27BR
NE
NE
NE
MW-2006R
S
S
MW-201BR
ND S
D
S
Notes:
1. Summary of results and trends are presented for samples collected from 2011 - 2019.
2. Trend results are presented when at least four samples were available and frequency of detection was >50 % . Statistically significant trends are reported at the 90 % confidence level.
3. Variability Index (VI) is calculated as the (maximum - minimum) / median concentration and is calculated using detected concentrations only. Values less than 1 indicate low variability in the dataset.
ND - Greater than 50 percent of constituent concentrations were non -detect
D - Statistically significant, decreasing concentration trend
S = Stable. No significant trend and variability is low (VI < 1)
= No significant trend and variability is high (VI > 1)
= Statistically significant, increasing concentration trend.
NE = Insufficient number of samples to evaluate trend (n < 4)
Mann -Kendall trend analysis ano results are preparea DY Arcaals D.S. Inc.
and included in a technical memorandum titled Plume Stability Evaluation
- Belews Creek Steam Station (Arcadis 2019)
Page 1 of 1

TABLE 6-8
SEEP CORRECTIVE ACTION STRATEGY
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Regulatory
Approximate Average
Seep ID
General Location
Present Flow
Seep Corrective Action Strategy
Program
(cfs)
Channel flow northwest of ash
Further decanting, and groundwater corrective action might cause seep to become dry.
S-02
SOC
basin to the Dan River
0.07
Besides source control measures (i.e. decanting and ash basin closure), no additional corrective
action for this location is anticipated.
East of ash basin; former ash
Further decanting and ash basin closure might cause flow to cease in the future
S-06
SOC
basin permitted outfall to Belews
0.01
Besides source control measures (i.e. decanting and ash basin closure), no additional corrective
Reservoir
action for this location is anticipated.
S-08
SOC
South of Pine Hall Road Landfill
0.05
Because of the seeps relatively remote location and low flowing conditions, corrective action using
phytoremediation technology would be considered.
5-09
SOC
South of ash basin and hydraulic
0'1
Location is associated with the Structural Fill, therefore corrective action for this location will be
divide, west of Structural Fill
addressed in the corrective action plan for the Structural Fill.
S-11
NPDES
North of ash basin, at toe of ash
0.75
No corrective action necessary. This location is part of the ash basin waste water treatment
basin dam
system and included in the NPDES permit.
Seeps are comingled. North of
Further decanting and groundwater corrective action might cause flow to cease.
S-10 and S-18*
SOC and NPDES
ash basin, downstream of ash
0.15
Potential corrective action remedies to address seeps include, but not limited to,
basin dam
phytoremediation and/or an extraction trench or shallow extraction well(s).
Notes:
cfs- cubic feet per second
NPDES - National Pollution Discharge Elimination System
SOC - Special Order by Consent
*Seep S-18 flows into seep S-11
Prepared by: ALA Checked by: 1EC
Page 1 of 1

TABLE 6-9
WATER SUPPLY WELL ANALYTICAL RESULTS SUMMARY
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Chromium
Total(VI)
Analytical Parameter
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chloride
Chromium
Cobalt
Iron
Lithium
Manganese
Molybdenum
Selenium
Strontium
Sulfate
Thallium
Dissolved
Vanadium
Solids
Impacted by
Coal Ash
Comments
Reporting Units
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
mg/L
ug/L
15A NCAC 02L Standard
1*
10
700
4*
700
2
250
NE
10
1*
300
NE
50
NE
20
NE
250
0.2*
Soo
0.3*
2017 Background Threshold Values (Bedrock Unit)'
1
1
6
0.2
50
0.8
3
0.3
5
0.8
228
NE
10
4
0.5
100
10
0.1
133
1
2019 Background Threshold Values (Bedrock Unit)'
1
2
11
0.2
50
0.08
3
0.4
11
0.8
341
30
64
6
0.5
99
IS
0.1
181
2
2019Background Data Set Range (Bedrock Unit)2
0.1 - 1.4
0.1 - 1.5
3.0 -11
0.01 - 0.2
33 -50
0.03 - 0.1
2.3 - 3.2
0.03 - 0.3
0.5 - 34.7
0.03 - 0.8
27 - 228
3.9-30
3.9 - 87.1
0.5 - 3.7
0.4 - 0.5
32.6 - 100
2.5 - 22.5
0.1- 0.1
52 - 250
0.2 - 2.3
SynTerm
Sample ID
Sample Collection Date
Analytical
Results
Map ID
BC-1002
BC-1002
10/27/2016
<0.5
<0.1
16.5
0.1
<25
<0.08
1.4
<0.03
<0.5
<0.1
<50
NA
1.8
<0.5
<0.5
13.5
<2
<0.1
<25
<0.3
NO
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC-2000
BC2000-RAW
07/18/2017
<0.5
0.44
18.7
<0.1
<25
<0.08
2.1
<0.075
<5
<0.1
NA
8.7
<0.5
32.5
9.2
<0.1
87
<0.3
NO
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
02/01/2018
<0.5
2
0.42
<0.1
5.5
<0.08
4.3
<0.025
<0.5
<0.1
<50
NA
1.8
3.6
<0.5
54.3
9.5
<0.1
107
0.46
NO
BC-2002
BC2002-RAW
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
O6/12/2018
<0.5
2
0.59
<0.1
<5
<0.08
4.6
<0.025
<0.5
<0.1
<50
NA
1.8
<0.5
63.3
8.3
<0.1
108
<0.3
NO
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
11/14/2017
<0.5
0.39
0.74
<0.1
<25
<0.08
1.6
<0.025
<0.5
<0.1
<50
NA
52.8
1.5
<0.5
24.5
2
<0.1
74
<0.3
NO
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
BC-2003
BC2003-RAW
02/O1/2018
<0.5
<0.1
7.5
<0.1
<5
0.085
1.6
<0.025
<0.5
<0.1
<50
NA
2.3
<0.5
<0.5
24.3
2.4
<0.1
55
<0.3
No
and PHR Landfill. Outride of the ash basin drainage system, separated by hydrologic divides.
05/15/2018
<0.5
<0.1
7.2
<0.1
<5
<0.08
1.5
0.065
<0.5
<0.1
<50
NA
2
<0.5
<0.5
23.4
2.2
<0.1
58
<0.3
NO
07/18/2017
<0.5
0.66
20.1
0.11
<25
<0.08
1.8
<0.025
<0.5
<0.1
<50
NA
7.5
0.58
<0.5
15.2
1.2
<0.1
48
<0.3
NO
BC-2004
BC2004-RAW
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
03/25/2018
<0.5
0.2
18.4
0.1
<25
<0.08
2
<0.025
<0.5
<0.1
<50
NA
7.6
0.72
<0.5
17
1.4
<0.1
38
<0.3
NO
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
04/10/2018
<0.5
0.2
20.5
0.1
<25
<0.08
2
<0.025
<0.5
<0.1
<50
NA
7.7
0.59
<0.5
17.4
1.3
<0.1
47
<0.3
NO
BC-2005
BC2005-RAW
10/05/2017
<0.5
0.2
0.94
<0.1
<25
<0.08
1.5
0.037
<0.5
<0.1
<50
NA
1.7
<0.5
<0.5
24.3
1
<0.1
49
0.34
NO
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
05/14/2018
<0.5
1.8
4.5
<0.1
<5
0.24
11.9
<0.025
<0.5
<0.1
<50
NA
<0.5
2.1
<0.5
75
3.6
<0.1
170
0.37
NO
Bc-2006
BC2006-RAW
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outride of the ash basin drainage system, separated by hydrologic divides.
06/13/2016
<0.5
0.49
1.2
<0.1
<10
<0.08
62.8
<0.025
<0.5
<0.1
<50
NA
6.6
<0.5
<0.5
33.8
<1
<0.1
155
<0.3
NO
BC-200]
BC2007-RAW
Ol/29/2018
<5
2
2.6
<0.1
<5
<0.08
1.2
0.5
<0.1
<50
NA
0.62
<0.5
<0.5
45.6
<1
<0.1
81
1
NO
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
02/06/2018
<0.5
11.4
21.7
<0.1
<5
0.081
7.4
<0.025
<0.5
<0.1
<50
NA
10.4
1.9
<0.5
55.7
2.4
<0.1
89
0.52
NO
BC-2008
BC2008-RAW
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
O6/12/2018
<0.5
12.8
18.9
<0.1
<5
<0.08
6.4
<0.025
<0.5
<0.1
<50
NA
8.4
2.7
0.58
54.8
3.4
<0.1
110
0.58
NO
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
01/25/2018
<0.5
19.4
1.9
<0.1
5.8
<0.08
2.8
<0.025
<0.5
<0.1
<50
NA
8.5
3
<0.5
135
8.2
<0.1
121
<0.3
NO
BC-2009
BC2009-RAW
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
05/03/2018
<0.5
17.4
2.3
<0.1
5.6
<0.08
2.8
<0.025
<0.5
<0.1
<50
NA
3
2.8
<0.5
126
6.9
<0.1
116
<0.3
NO
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC25
10/13/2016
<0.5
0.39
0.61
<0.1
<25
<0.08
3.7
0.049
<0.5
<0.1
<50
NA
0.74
0.56
<0.5
24.8
3
<0.1
69
0.46
NO
BC-1001
10/13/2016
<0.5
<0.1
16.5
0.13
<25
<0.08
1.1
1
1.3
<0.1
<50
NA
6.1
<0.5
<0.5
25.2
<2
<0.1
39
0.68
NO
BC-2011
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
BC-1006
08/11/2015
<0.5
<I
<5
<0.2
<50
<0.08
3
NA
<5
<1
<10
NA
<5
<1
<1
25
2.8
<0.2
61
0.396
NO
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
O8/11/2015
<1
<0.5
0.46
<1
<5
<1
3.1
0.037
<0.5
<0.5
<50
NA
1.4
0.68
<0.5
23.3
3.5
<0.1
76
<1
NO
BC2011-RAW
09/19/2017
<0.5
0.81
1.4
<0.1
29
<0.08
3.5
0.079
0.72
<0.1
<50
NA
3
1.3
0.97
60.9
4.2
<0.1
72
0.76
NO
BC-2010
BC2010-RAW
01/25/2018
<0.5
2.4
33.2
0.17
<5
<0.08
1.7
<0.025
<0.5
0.11
3,010
NA
487
0.7
<0.5
73.9
9.6
<0.1
143
<0.3
NO
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
10/03/2017
<0.5
0.15
7.7
0.21
<25
<0.08
2.1
0.8
1.2
<0.1
<50
NA
1.5
<0.5
<0.5
28.1
<1
<0.1
73
0.95
NO
BC-2012
BC2012-RAW
Southwest of and upgradient of ash basin. Not within the direction of groundwater flow from the ash basin
05/03/2018
<0.5
0.11
9.5
0.32
<5
<0.08
3.9
0.66
0.98
<0.1
<50
NA
1.8
<0.5
<0.5
34.3
<1
<0.1
63
0.59
NO
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC-2013
BC2013-RAW
O1/16/2018
<0.5
31.8
59.7
0.2
<5
<0.08
10.9
0.032
<0.5
<0.1
<50
NA
0.93
2.2
<0.5
81.4
3.2
<0.1
144
0.37
NO
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
11/14/2017
<0.5
<0.1
7
<0.1
<25
<0.08
1.5
<0.025
<0.5
<0.1
<50
NA
1.8
<0.5
<0.5
21.9
9.9
<0.1
95
<0.3
NO
BC-2014
BC2014-RAW
Southwest of and upgradient of ash basin. Not within the direction of groundwater flow from the ash basin
01/25/2018
<0.5
0.41
0.89
<0.1
<5
<0.08
1.6
<0.025
0.74
<0.1
74.1
NA
1.5
<0.5
23.9
9.5
<0.1
102
<0.3
No
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
05/15/2018
<0.5
0.49
0.75
<0.1
<5
<0.08
1.3
<0.025
<0.5
<0.1
57.2
NA
1.5
<0.5
22.4
8.9
<0.1
83
<0.3
No
BC-2015
BC2015-RAW
07/28/2017
<0.5
15.1
5.9
<0.1
<25
<0.08
5.8
<0.025
<0.5
<0.1
<50
NA
0.9
3.2
<0.5
190
6.3
<0.1
141
<0.3
No
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC13
08/31/2017
<0.5
9.3
2.3
<0.1
64.2
<0.08
19.9
0.028
<0.5
<0.1
<50
NA
3.3
1.5
<0.5
<0.1
7.5
<0.1
179
3.3
No
BC2016-RAW
01/25/2018
<0.5
5.7
2.6
<0.1
85.7
<0.08
25.7
0.033
<0.5
<0.1
<50
NA
5.3
1.7
0.54
<0.1
8.6
<0.1
197
4
No
BC-2016
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
BC2016-RAW
03/03/2018
<0.5
6
2.4
<0.1
86.8
<0.08
25.7
<0.025
<0.5
<0.1
<50
NA
3.7
1.7
0.5
<0.1
7.8
<0.1
200
9.1
No
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC2016-RAW
05/15/2018
2
4.9
2.9
<0.1
80.5
<0.08
26.4
0.027
0.64
<0.1
<50
NA
9.7
1.9
<0.5
<0.1
7.9
<0.1
223
4.3
No
BC2017-RAW
11/21/2017
<0.5
<0.1
19
<0.1
<25
0.12
5.9
<0.025
3.6
<0.1
50.9
NA
4.4
<0.5
<0.5
41.7
3
<0.1
74
<0.3
NO
BC-201]
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outride of the ash basin drainage system, separated by hydrologic divides.
BC2017-RAW
O5/30/2016
<0.5
<0.1
16.9
<0.1
<5
<0.08
5.4
<0.025
<0.5
<0.1
<50
NA
2.4
<0.5
<0.5
37.2
3.3
<0.1
79
<0.3
No
BC-2019
BC2019-RAW
0]/16/201]
<0.5
<0.1
10.6
<0.1
<25
<0.08
1.8
0.65
<0.5
0.13
2,140
NA
16
1.7
<0.5
48.9
8.1
<0.1
96
0.32
NO
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
Urryllim

TABLE 6-9
WATER SUPPLY WELL ANALYTICAL RESULTS SUMMARY
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Chromium
Total(VI)
Analytical Parameter
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chloride
Chromium
Cobalt
Iron
Lithium
Manganese
Molybdenum
Selenium
Strontium
Sulfate
Thallium
Dissolved
Vanadium
Solids
Impacted by
Coal Ash
Comments
Reporting Units
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
mg/L
ug/L
15A NCAC 02L Standard
1*
10
700
4*
700
2
250
NE
10
1*
300
NE
50
NE
20
NE
250
0.2*
Soo
0.3*
2017 Background Threshold Values (Bedrock Unit)'
1
1
6
0.2
50
0.8
3
0.3
5
0.8
228
NE
10
4
0.5
100
10
0.1
133
1
2019 Background Threshold Values (Bedrock Unit)'
1
2
11
0.2
50
0.08
3
0.4
11
0.8
341
30
64
6
0.5
99
IS
0.1
181
2
2019Background Data Set Range (Bedrock Unit)2
0.1 - 1.4
0.1- 1.5
3.0 -11
0.01 - 0.2
33 -50
0.03 - 0.1
2.3 - 3.2
0.03 - 0.3
0.5 - 34.7
0.03 - 0.8
27 - 228
3.9-30
3.9 - 87.1
0.5 - 3.7
0.4 - 0.5
32.6 - 100
2.5 - 22.5
0.1- 0.1
52 - 250
0.2 - 2.3
Sy.Terra
Sample ID
Sample Collection Date
Analytical
Results
Map ID
BC4 Well A
01/24/2018
<0.5
0.17
5.6
<0.1
<5
<0.08
2.5
0.11
<0.5
<0.1
<50
NA
<0.5
3.4
<0.5
43.7
4.3
<0.1
99
2.2
NO
BC4 Well A
03/08/2018
<0.5
<0.1
9.1
<0.1
<5
<0.08
1.8
0.12
<0.5
<0.1
<50
NA
<0.5
2.1
<0.5
41.3
2.6
<0.1
81
2.4
No
6C-2020
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
02/18/2015
6.9
1
NA
2.98
43
5
112
2
<0.5
<2
<0.5
<50
<0.15
<5
<2
<3
<25
<2
<2
<0.5
NO
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
02/18/2015
<1
<1
7
<1
<50
<1
1.5
NA
<5
<1
18
NA
<5
2.78
<1
41
3.9
<0.2
91
2.22
No
BC2020-RAW
8/26/2015
<0.5
<0.5
3.6
<0.2
<5
<0.08
1.6
0.085
<0.5
<0.5
<50
NA
NA
4.1
<0.5
44.8
4.8
<0.1
102
2.4
NO
BC9
03/05/2015
<1
2.2
<5
<1
<50
<1
5.7
NA
<5
<1
374
NA
37
<1
<1
72
9.3
<0.2
120
<0.3
No
BC-2021
North and upgradient of the ash basin. Not within the direction of groundwater flaw from the ash basin and
BC9
08/11/2015
<0.5
1.8
0.74
<0.2
<5
<0.08
6.3
<0.03
<0.5
<0.5
322
NA
19.5
<0.5
<0.5
73.2
9.8
<0.1
119
<1
NO
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC2021-RAW
O6/27/2017
<0.5
1.8
0.72
0.11
<25
<0.08
5.7
<0.025
<0.5
0.1
321
NA
34.7
<0.5
<0.5
67.6
9.7
<0.1
124
<0.3
NO
BC6
10/16/2017
<0.5
0.2
4.1
0.25
<25
0.12
9.7
<0.025
1.6
0.11
576
NA
30.8
<0.5
<0.5
63.9
6.6
<0.1
106
<0.3
NO
Northeast and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
BC-2022
BC2022-RAW
O6/27/2018
<0.5
0.16
3.9
0.24
<10
<0.08
12.8
<0.025
c0.5
<0.1
762
NA
35.3
<0.5
<0.5
65.2
9.1
<0.1
109
<0.3
NO
and PHR Landfill. Outride of the ash basin drainage system, separated by hydrologic divides.
BC2022-RAW
03/04/2015
<I
<1
<5
<1
<50
<1
12
NA
<5
<1
354
NA
43
<I
<1
65
10
<0.2
110
<0.3
NO
O1/16/2018
<0.5
1
0.5
<0.1
:5
<0.08
2.3
<0.025
<0.5
<0.1
<50
NA
9.2
0.87
<0.5
98
9.4
<0.1
123
<0.3
NO
BC-2025
BC2025-RAW
North and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
06/06/2018
<0.5
1
0.46
<0.1
6
<0.08
2.1
<0.025
<0.5
<0.1
<50
NA
9.1
0.91
<0.5
93.4
9.4
<0.1
135
<0.3
NO
BC-2026
BC2026-RAW
07/18/2017
<0.5
3.5
<0.1
<0.1
c25
<0.08
1.2
0.2
<0.5
0.21
217
NA
17.5
1
<0.5
45.9
2
<0.1
105
1.6
NO
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC15
09/19/2017
1.9
0.88
0.19
0.19
<25
<0.08
5.2
0.62
3.9
1.5
NA
32.5
<0.5
<0.5
61
1.1
<0.1
53
1.1
NO
BC2027
Northeast and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
BC2027-RAW
O5/30/2018
<0.5
0.42
c0.1
<0.1
<5
<0.08
5.8
0.24
0.64
0.22
<50
NA
6.9
<0.5
<0.5
60.6
1
<0.1
81
<0.3
NO
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
02/01/2018
<0.5
<0.1
22.3
0.13
<5
<0.08
5
0.048
<0.5
<0.1
103
NA
2.7
<0.5
<0.5
36.6
<1
<0.1
66
<0.3
NO
BC-2031
BC2031-RAW
Southwest and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin
O6/12/2018
<0.5
<0.1
23.8
0.12
<5
<0.08
5
0.031
<0.5
<0.1
194
NA
2.9
<0.5
<0.5
39.7
<1
<0.1
60
<0.3
No
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC2034-RAW
02/01/2018
<0.5
0.62
<0.1
<0.1
<5
<0.08
3.9
0.062
<0.5
<0.1
<50
NA
1.3
0.94
<0.5
53.4
2.2
<0.1
74
0.52
NO
BC-2034
Southwest and upgradient of the ash basin. Not within the direction of groundwater flaw from the ash basin
BC2034-RAW
04/25/2018
<0.5
0.48
<0.1
<0.1
<5
<0.08
3.7
0.06
<0.5
<0.1
<50
NA
0.69
0.93
<0.5
54.9
2.5
<0.1
96
0.38
No
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC-2036
BC2036-RAW
09/19/2017
<0.5
<0.1
0.13
0.13
<25
<0.08
1.2
0.97
1.3
<0.1
<50
NA
3.4
<0.5
<0.5
24.4
<I
<0.1
27
0.48
No
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC-2037
BC2037-RAW
03/06/2018
<0.5
<0.1
<0.1
<0.1
9.1
<0.08
3.9
1.1
1.5
<0.1
<50
NA
1
1.5
<0.5
59.7
3
<0.1
97
NO
Northeast and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outride of the ash basin drainage system, separated by hydrologic divides.
BC-2040
BC2040-RAW
05/18/2018
<0.5
0.84
29.3
0.12
<5
<0.08
1.9
0.79
<0.1
<50
NA
0.7
<0.5
<0.5
21.7
<1
<0.1
67
0.85
NO
Southwest antl upgratlient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC-1
BC1
10/07/2015
<0.5
1.3
2.4
<0.2
<5
<0.08
7
0.093
1.4
<0.5
261
NA
173
<0.5
<0.5
165
12.2
<0.1
95
<1
NO
Northeast and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outride of the ash basin drainage system, separated by hydrologic divides.
04/09/2015
<1
<1
7
<1
<50
<1
3.4
NA
<5
<1
<10
NA
<5
<1
<1
51
2.5
<0.2
80
0.451
NO
08/25/2015
<0.5
0.77
6.1
<0.2
<5
<0.08
3.2
0.06
<0.5
<0.5
<50
NA
NA
1.1
<0.5
51.9
3
<0.1
64
<1
NO
BC-8
BC8
Southwest and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
and PHR Landfill. Outride of the ash basin drainage system, separated by hydrologic divides.
09/15/2015
<0.5
0.77
6.6
<0.2
<5
<0.08
3.5
0.06
0.91
<0.5
<50
NA
1.4
1
<0.5
53.8
3.1
<0.1
71
<1
NO
09/15/2015
<1
<1
7
<1
<50
<1
3.5
NA
<5
<1
<10
NA
<5
<1
<1
53
2.3
<0.2
75
0.489
NO
BC-10
BC10
09/15/2015
<0.5
<0.5
18.6
<0.2
<5
<0.08
3
0.057
1.6
<0.5
56.8
NA
4
<0.5
<0.5
33.6
<2
<0.1
42
<1
No
Southwest and upgradient of the ash basin. Not within the direction of groundwater flaw from the ash basin
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
08/10/2015
<0.5
10.8
3
<0.2
<5
<0.08
2.2
<0.3
<0.5
<0.5
<50
NA
3.6
20.2
<0.5
94.2
8.1
<0.1
136
<1
NO
BC-20
BC20
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
08/10/2015
<1
10.6
<5
<I
<50
<1
2.1
NA
<5
<3
28
NA
<5
19.4
<1
98
8
<0.2
150
<0.3
NO
BC-21
BC21
02/23/2016
<1
<1
11
<1
<50
<1
4
NA
<5
<1
11
NA
<5
<1
<1
19
1
<0.2
71
0.365
NO
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
08/12/2015
<0.5
<0.5
5.8
<0.2
<5
<0.08
1.6
2.1
2.5
<0.5
<50
NA
<0.5
1.1
<0.5
25.2
3.2
<0.1
74
1.7
NO
BC-23-1
BC23-1
Northeast and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
08/12/2015
<1
<1
6
<1
<50
<1
1.4
NA
<5
<1
11
NA
<5
1.21
<1
27
1
<0.2
52
1.69
NO
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
08/12/2015
<0.5
1.6
8.3
<0.2
<5
<0.08
18.6
1.9
2.3
<0.5
<50
NA
0.62
0.76
<0.5
87.7
3.5
<0.1
166
1.3
NO
BC-23-2
BC23-2
Northeast and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
08/12/2015
<1
1.7
9
<1
<50
<1
17
NA
<5
<1
14
NA
<5
<1
<1
99
1.5
<0.2
150
1.33
NO
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
08/12/2015
<0.5
0.69
1
<0.2
<5
<0.08
14.1
<0.03
<0.5
<0.5
<50
NA
148
<0.5
<0.5
122
16.8
<0.1
223
<1
NO
BC-23-3
BC23-3
Northeast and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
08/12/2015
<1
<1
<5
<1
<50
<1
13
NA
<5
<1
14
NA
159
<1
<3
133
16
<0.2
210
<0.3
No
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
08/12/2015
<0.5
1.5
1.2
0.22
<5
<0.08
8.3
<0.03
<0.5
<0.5
155
NA
144
1.4
<0.5
92.7
20.2
<0.1
169
<3
NO
BC-23-4
BC 3-4
Northeast and upgradient of ash basin. Not within the direction of groundwater Flaw from the ash basin and
08/12/2015
<1
1.6
<5
<1
<50
<1
7.8
NA
<5
<1
164
NA
150
1.59
<3
103
19
<0.2
150
<0.3
No
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
O1/12/2011
<0.5
<0.5
7.2
0.3
<5
<0.08
14.6
<0.03
<0.5
4.3
<50
NA
23.8
<0.5
<0.5
102
17.4
<0.1
122
<1
No
BC-23-5
BC23-5
Northeast and upgradient of the ash basin. Not within the direction of groundwater Flow from the ash basin
08/12/2015
<1
<1
7
<1
<50
<1
13
NA
<5
4.06
<10
NA
26
<1
<1
110
11
1 <0.2
1 120
1 <0.3
NO
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.

TABLE 6-9
WATER SUPPLY WELL ANALYTICAL RESULTS SUMMARY
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Chromium
Total(VI)
Analytical Parameter
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chloride
Chromium
Cobalt
Iron
Lithium
Manganese
Molybdenum
Selenium
Strontium
Sulfate
Thallium
Dissolved
Vanadium
Solids
Impacted by
Coal Ash
Comments
Reporting Units
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
mg/L
ug/L
15A NCAC 02L Standard
1*
10
700
4*
700
2
250
NE
10
1*
300
NE
50
NE
20
NE
250
0.2*
Soo
0.3*
2017 Background Threshold Values (Bedrock Unit)'
1
1
6
0.2
50
0.8
3
0.3
5
0.8
228
NE
10
4
0.5
100
10
0.1
133
1
2019 Background Threshold Values (Bedrock Unit)'
1
2
11
0.2
50
0.08
3
0.4
11
0.8
341
30
64
6
0.5
99
IS
0.1
181
2
2019Background Data Set Range (Bedrock Unit)2
0.1 - 1.4
0.1 - 1.5
3.0 -11
0.01 - 0.2
33 -50
0.03 - 0.1
2.3 - 3.2
0.03 - 0.3
0.5 - 34.7
0.03 - 0.8
1 27 - 228
3.9-30
3.9 - 87.1
0.5 - 3.7
0.4 - 0.5
32.6 - 100
2.5 - 22.5
0.1- 0.1
52 - 250
0.2 - 2.3
SynTerra
Sample ID
Sample Collection Date
Analytical
Results
Map ID
BC-28
BC28
10/07/2015
<[
3.03
<5
<I
<50
<3
1.5
NA
<5
<1
17
NA
<5
3.49
<1
175
19
<0.2
120
<0.3
NO
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
BC-29
BC29
10/07/2015
<1
<1
12
<1
<50
<1
3.2
NA
<5
<1
17
NA
<5
<1
<1
23
1.3
<0.2
78
0.557
No
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
10/07/2015
<0.5
Los
2.2
<0.2
<5
<0.08
7.5
<0.03
<0.5
<0.5
<50
NA
0.7
10.5
1.8
64.6
8.7
<0.1
152
<1
NO
BC-30
BC30
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
10/07/2015
<1
114
<5
<1
<50
<1
6.9
NA
<5
<1
<10
NA
<5
11.7
2.22
76
8.7
<0.2
160
0.468
NO
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
10/07/2015
<0.5
22.5
3.1
<0.2
<5
<0.08
4.1
<0.03
<0.5
<0.5
<50
NA
23.8
6.8
<0.5
3.2
<0.1
127
<I
NO
BC-32
BC32
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
10/07/2015
<1
23.7
<5
<1
<50
<1
3.6
NA
<5
<1
13
NA
29
7.21
<1
3.4
<0.2
140
<0.3
NO
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
11/03/2015
<0.5
1.9
7.7
<0.2
<5
<0.08
2.8
<0.03
19.3
<0.5
269
NA
67.6
1.9
<0.5
85.2
9.1
<0.1
148
<3
NO
BC-33
BC33
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
11/03/2015
<1
1.97
17
<1
<50
<1
2.5
NA
21
<1
262
NA
79
1.46
<1
94
11
<0.2
130
<0.3
NO
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
12/29/2015
<0.5
40.3
<0.2
<0.2
<5
<0.08
8.3
<0.03
0.52
<0.5
<50
NA
0.8
4.5
<0.5
94.4
6.1
<0.1
156
<3
NO
BC34
BC34
Soutw and upgradient of the ash basin. Not within the of groundwater flow from the ash basin
12/29/2015
<1
42.9
<1
<1
<50
<1
8.1
NA
<5
<1
13
NA
<5
4.89
<1
110
6.2
<0.2
180
0.748
NO
an system,
and PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
12/29/2015
<0.5
15.7
3.9
<0.2
<5
<0.08
7.2
JAB
1.6
<0.5
365
NA
253
2,1
<0.5
44.1
14.2
<0.1
143
<3
NO
BC-35
BC35
West and upgradient of the ash basin. Not within the direction of groundwater flow from the ash basin and
12/29/2015
<1
16.7
<5
<1
<50
<1
7.1
NA
<5
<1
44]
NA
332
3.15
<1
52
15
<0.2
160
OA89
No
PHR Landfill. Outside of the ash basin drainage system, separated by hydrologic divides.
Notes:
- Background threshold values were calculated using data from background groundwater samples collected June 2015 to April 2111
2 - Updated background threshold values were calculated using data from background groundwater samples collected October 2010 to December 2018 and sumbmitted to NCDEQ June 2019
Background threshold values have been rounded to similar levels of precision as 15A North Carolina Administrative Code (NCAC) 02L Standard or Interim Maximum Allowable Concentration (IMAC).
Bold text - greatest comparative value
0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L .0202 Standard or the IMAC. (Effective date for 15A NCAC 02L .0202 Standard and IMAC is April 1, 2013)
0 - Bold highlighted concentration indicates exceedance BN from April 2017 or December 2018, whichever is greater.
EM - Highlighted concentration indicates value is either within range of background threshold values for constituents where there is no regulatory standard/background threshold values are greater than regulatory standard, or within range of background threshold value and the regulatory standard
Bold text - Constituent concentration exceeds applicable comparison criteria.
* - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013
- Concentration not detected at or above the adjusted reporting limit.
COI - Constituent of Interest
NA - not available
NE - not established
NM - Not measured
mg/L - Milligrams Per Liter
pg/L - Micrograms Per Liter
S.U. - standard units
Prepared by: DAA Checked by: JHC

TABLE 6-10
NPDES PERMIT LIMITS AND ANTICIPATED GROUNDWATER REMEDIATION PARAMETER LEVELS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
NPDES Outfalls
Internal Outfall 006A
Outfall 006
IAP System Mean
Groundwater Mean Concentration by Flow
Concentration
Zone'
Effluent Limitations and Monitoring Requirements
o
0
3
N
O
O
3
N
O
O
V
�Ol
>.C1
4-1i
3
��
+S+ i
3
��
LL
0
�N
LL
O
ON
Parameter
o y
M •x
p
x
C
s
y
y
iQ
�
iQ
pM
�
Flow2
2.0 MGD
NS
NS
NS
13 GPM
NA
NA
NA
Oil and Grease
15.0 mg/L
20.0 mg/L
15.0 mg/L
20.0 mg/L
NA
NA
NA
NA
TSS
30.0 mg/L
50.0 mg/L
30.0 mg/L
50.0 mg/L
5.0 mg/L
6 mg/L
5 mg/L
4 mg/L
Total Copper
211.3 pg/L
231.4 pg/L
1.0 mg/L
1.0 mg/L
0.001 mg/L
0.002 mg/L
0.001 mg/L
0.0009 mg/L
Total Lead
78.9 pg/L
1668 pg/L
16.9 pg/L
367.7 pg/L
0.8 pg/L
0.3 pg/L
0.2 pg/L
0.1 pg/L
Total Selenium
134 pg/L
1237 pg/L
NS
NS
1 pg/L
5 pg/L
1 pg/L
0.7 pg/L
Total Molybdenum
4289 pg/L
4289 pg/L
NS
NS
3 pg/L
1 pg/L
2 pg/L
8 pg/L
Total Aluminum
174.2 mg/L
174.2 mg/L
NS
NS
0.1 mg/L
0.7 mg/L
0.2 mg/L
0.2 mg/L
Ammonia
1.0 mg/L
5.0 mg/L
1.0 mg/L
5.0 mg/L
NA
NA
NA
NA
Total Iron4
1.0 mg/L
1.0 mg/L
1.0 mg/L
1.0 mg/L
0.2 mg/L
0.3 mg/L
0.2 mg/L
0.1 mg/L
Chronic Toxicity5
See Note
5
See Note 5
NA
NA
NA
NA
Turbidity6
See Note 6
See Note 6
NA
NA
NA
NA
pH
Between
6.0 and 9.0 S.U.
Between
6.0 and 9.0 S.U.
5.3 S.U.
5.3 S.U.
6.3 S.U.
8.9 S.U.
Notes:
1 - Downqradient groundwater monitoring wells in the area of groundwater remediation; Q1 2018 throuqh Q2 2019 data.
z - The flow limit for Internal Outfall 006A is only applicable to interstitial water.
3 - Ammonia limit and monitoring only applicable in the event of the emergency release of anhydrous ammonia.
4 - Limits apply only when chemical metal cleaning wastewaters are being discharged.
5 - Whole effluent toxicity shall be monitored by chronic toxicity (Ceriodaphnia) Pass/Fail at 3.7% for Outfall 006A and 17.4% for Outfall 006.
6 - The discharge from this facility shall not cause turbidity in the receiving stream to exceed 50 NTU.
GPM - gallons per minute
IAP - Interim Action Plan
MGD - million gallons per day
NA - not analyzed
NS - not specified
mg/L - milligrams per liter
TSS - total suspended solids
pg/L - micrograms per liter
S.U. - standard units
Prepared by: ALA Checked by: CDE
Page 1 of 1

TABLE 6-11
FEATURE IRRIGATION SYSTEM SETBACK
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Feature
Irrigation System Setback
(feet)
Spray
Drip
Private residence
400
100
Place of assembly owned by permittee
200
15
Surface waters
100
100
Property line
150
50
Note:
References: 15A NCAC 02T.056
Prepared by: VTV Checked by: CDE
Page 1 of 1

TABLE 6-12
REMEDIAL TECHNOLOGY SCREENING SUMMARY
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC BELEWS CREEK, NC
Summary of Remedial Technology
Retain Technology for Further Consideration
Screening
Technology
Yes/No
Rationale
COIs pose no unacceptable risk to human health or the environment under
Monitored Natural Attenuation
Yes
conservative exposure scenarios and could be implemented in conjunction with
source control measures.
In -Situ Technologies
Low Permeability Barriers
No
Installation to depths greater than 50 feet would be technically challenging and
costly.
Groundwater Infiltration and Flushing
Yes
Possible application to enhance capture of mobile COIs (e.g., boron).
The area, depth and heterogeneity of geological conditions requiring
Encapsulation
No
groundwater remediation are greater in size and complexity for uniform
implementation of this technology.
The area, depth and heterogeneity of geological conditions requiring
Permeable Reactive Barrier
No
groundwater remediation are too large for feasible trenching. Injection of
reagents through boreholes is possible; however, technology is not well
established for boron.
Groundwater Extraction Technologies
Vertical Extraction Wells
Yes
Applicable for groundwater extraction of mobile COIs. This technology will be
considered for corrective action of seep(s) north of the ash basin dam.
Although, applicable for groundwater extraction of mobile COIs, vertical
Horizontal/Angular Extraction Wells
No
extraction wells are just as effective in achieving hydraulic control and are cost
effective than horizontal wells.
This technology is not capable of achieving depths necessary to remediate
Extraction Trenches
Yes
groundwater, however this technology will be considered for corrective action
of seep(s) north of the ash basin dam.
Hydraulic Fracturing
No
Not warranted based on the limited concern about COIs in bedrock.
This technology is not capable of achieving extraction rates necessary to
achieve groundwater remediation at depths greater than 50 feet within
Phytoremediation
Yes
reasonable timeframes, however this technology will be considered for
corrective action of low flowing seep(s) north of the ash basin dam and in
remote locations of the Site.
Groundwater Treatment Technologies
pH Adjustment
Yes
Retained for remedial alternatives that include clean water infiltration or
extraction.
Precipitation
Yes
Retained for remedial alternatives that include groundwater clean water
infiltration or extraction.
No feasible or economical method to dispose of the regeneration effluent and
Ion Exchange
No
groundwater influent streams might have geochemical characteristics that
interfere with other treatment technology.
Pretreatment and a high volume of reject effluent that requires additional
Membrane Filtration
No
treatment prior to disposal make this technology costly and high maintenance.
Other treatment options to remove soluble metals from extracted groundwater
are better suited for the Site.
Dis osal of Extracted Groundwater
NPDES Permitted Discharge
Yes
Existing permitted discharges for wastewater are already in place.
POTW
No
There is extensive distance between the WWTS and the Site.
Non -Discharge Permit/Infiltration Gallery
No
Treatment prior to application could result in a complicated systems with
significant operation and maintenance efforts.
Non -Discharge Permit/Land Application
No
Treatment prior to application could result in a complicated systems with
significant operation and maintenance efforts
Beneficial Reuse
Potential application, but only as a system improvement and supplemental
Fire Protection
No
source of water. To be determined at a later date, and based on actual
extraction rates of operational system.
Potential application, but only as a system improvement and supplemental
Non -Contact Cooling Water
No
source of water. To be determined at a later date, and based on actual
extraction rates of operational system.
Dust Suppression and Truck Wash
No
Limited use, and effort is not justified to substituent extracted groundwater for
currently established procedures.
Prepared by: ALA Checked by: CDE
Page 1 of 1

TABLE 6-13
ALTERNATIVE 3 GROUNDWATER EXTRACTION AND CLEAN WATER INFILTRATION
SUMMARY
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Groundwater Extraction Well System
Vertical Wells
Number of Wells
Flow Zone
Total Depth
ft b s
4
Shallow
<30
3
Shallow
30-59
19
Deep/Bedrock
60-89
87
Bedrock
90-119
Total Well Count: 113
System flow and operation assumptions:
Flow rate: 0.8 gpm per well. Total system extraction flow rate of approximately 90 gpm.
Extraction wells operate to maintain water level near bottom of the well.
The groundwater extraction well system also includes 10 already existing extraction wells, as
part of the interim action system. Post -decanting, the 10 interim action extraction wells are
predicted to remove a total of about 2.5 gpm.
Clean Water Infiltration Well System
Vertical Wells
Number of Wells
Flow Zone
Total Depth
ft b s
2
Shallow
30-59
22
TRZ/Bedrock
60-89
15
Bedrock
90-119
0
Bedrock
120-149
1
Bedrock
150-179
7
Bedrock
180+
Total Well Count: 47
System flow and operation assumptions:
Flow rate: 1.2 gpm per well. Total system infiltration flow rate of approximately 55 gpm.The
groundwater infiltration rate is based on predictive flow and transport modeling, which
assumes a 25 percent well efficiency.
Clean water infiltration wells operate with pressure head set to 10 feet above the ground
surface.
Horizontal Well
Number of Wells
Flow Zone
Total Depth
ft b s
1 (900 foot long)
Shallow
60
System flow and operation assumptions:
Flow rate: Total infiltration flow rate of 110 gpm.The groundwater infiltration rate is based on
predictive flow and transport modeling, which assumes a 25 percent well efficiency.
Clean water infiltration wells operate with pressure head set to 10 feet above the ground
surface.
Notes:
ft bgs - feet below qround surface
gpm - gallons per minute
Prepared by: ALA Checked by: CDE
Page 1 of 1

TABLE 6-14
ENVIRONMENTAL SUSTAINABILITY COMPARISONS FOR REMEDIATION ALTERNATIVES
CORRECTIVE ACTION PLAN UPDATE
BELEW'S CREEK STEAM STATION
DUKE ENERGY CAROLINAS LLC, BELEW'S CREEK, NC
Remedial Alternative
Remedial Alternative 1 —
Monitored Natural Attenuation
Remedial Alternative 2 —
Groundwater Extraction and
Treatment
Remedial Alternative 3 —
Groundwater Extraction combined
with Clean Water Infiltration and
Treatement
Emissions
Units
CO2 Emissions
metric ton
5.36E+01
4.88E+04
1.65E+04
Onsite NO, Emissions
metric ton
6.79E-02
1.45E+00
3.30E+01
Onsite SOx Emissions
metric ton
6.93E-03
1.49E-01
3.37E+00
Onsite PMIo Emissions
metric ton
6.11E-03
1.31E-01
2.97E+00
Total NOx Emissions
metric ton
1.00E-01
1.77E+02
7.55E+01
Total SOx Emissions
metric ton
3.67E-02
1.63E+02
3.81E+01
Total PMIo Emissions
metric ton
1.07E-02
1.92E+01
1.58E+01
Total Energy Used
MMBTU
1.11E+04
2.84E+06
6.26E+06
Total Emissions
metric ton
5.38E+01
4.92E+04
1.66E+04
Notes:
CO2 - Airborne emissions of carbon dioxide
MMBTU - Million British Thermal Units
NOX - Airborne emissions of nitrogen oxides (combination of nitrogen monoxide and nitrogen dioxide)
SOX - Airborne emissions of sulfur oxides (combination of sulfur monoxide, sulfur dioxide, sulfur trioxide, and others)
PMIo - Airborne emissions of particulate matter that is 10 micrometers or less in diameter
Prepared by: GTC Checked by: CBC
Page 1of1

TABLE 6-15
MODELED CLEAN WATER INFILTRATION WELL DETAILS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Well ID
Fasting
(NAD 88)
Northing
(NAD 88)
Approximate
Ground Surface
Elevation
(feet)
Pressure at Well
Head
(ft of Head Above
Ground Surface)
Well
Depth
(ft BGS)
Targeted Flow Zones
Total
Simulated
Flow
(gpm)
Vertical Injection Wells
IW-1
1681274.70
929063.70
727
10
160
Saprolite/Transition Zone/Bedrock
1.2
IW-2
1681230.20
929033.40
714
10
148
Saprolite/Transition Zone/Bedrock
1.2
IW-3
1681179.70
928997.00
717
10
148
Saprolite/Transition Zone/Bedrock
1.2
IW-4
1681121.10
928956.60
726
10
156
Saprolite/Transition Zone/Bedrock
1.2
IW-5
1681068.60
928918.30
717
10
145
Saprolite/Transition Zone/Bedrock
1.2
IW-6
1681022.10
928890.00
715
10
144
Saprolite/Transition Zone/Bedrock
1.2
IW-7
1680963.50
928851.60
725
10
153
Saprolite/Transition Zone/Bedrock
1.2
IW-8
1680927.20
928815.20
736
10
162
Saprolite/Transition Zone/Bedrock
1.2
IW-9
1681420.93
928813.43
753
10
171
Saprolite/Transition Zone/Bedrock
1.2
IW-10
1681409.13
928745.43
761
10
176
Saprolite/Transition Zone/Bedrock
1.2
IW-11
1681394.33
928659.73
763
10
174
Saprolite/Transition Zone/Bedrock
1.2
IW-12
1681379.53
928571.13
761
10
172
Saprolite/Transition Zone/Bedrock
1.2
IW-13
1681376.63
928479.53
755
10
164
Saprolite/Transition Zone/Bedrock
1.2
IW-14
1681364.83
928408.63
757
10
166
Saprolite/Transition Zone/Bedrock
1.2
IW-15
1681471.13
928881.33
748
10
172
Saprolite/Transition Zone/Bedrock
1.2
IW-16
1681547.93
928899.03
753
10
178
Saprolite/Transition Zone/Bedrock
1.2
IW-17
1681624.83
928899.03
752
10
172
Saprolite/Transition Zone/Bedrock
1.2
IW-18
1681710.43
928896.13
754
10
172
Saprolite/Transition Zone/Bedrock
1.2
IW-19
1681787.23
928881.33
758
10
170
Saprolite/Transition Zone/Bedrock
1.2
IW-20
1681217.80
928484.70
763
10
176
Saprolite/Transition Zone/Bedrock
1.2
IW-21
1681312.20
928701.50
753
10
168
Saprolite/Transition Zone/Bedrock
1.2
IW-22
1681323.40
928683.80
753
10
168
Saprolite/Transition Zone/Bedrock
1.2
IW-23
1681337.40
928717.90
750
10
166
Saprolite/Transition Zone/Bedrock
1.2
IW-24
1681296.60
928669.20
743
10
159
Saprolite/Transition Zone/Bedrock
1.2
IW-25
1681282.10
928630.10
745
10
159
Saprolite/Transition Zone/Bedrock
1.2
IW-26
1681254.00
928617.00
745
10
159
Saprolite/Transition Zone/Bedrock
1.2
IW-27
1681266.30
928595.70
745
10
159
Saprolite/Transition Zone/Bedrock
1.2
IW-28
1681294.50
928694.00
743
10
159
Saprolite/Transition Zone/Bedrock
1.2
IW-29
1681305.50
928735.90
750
10
166
Saprolite/Transition Zone/Bedrock
1.2
IW-30
1681332.30
928737.90
750
10
166
Saprolite/Transition Zone/Bedrock
1.2
IW-31
1681347.10
928624.70
755
10
168
Saprolite/Transition Zone/Bedrock
1.2
IW-32
1681333.50
928537.00
750
10
161
Saprolite/Transition Zone/Bedrock
1.2
IW-33
1681308.60
928595.90
754
10
166
Saprolite/Transition Zone/Bedrock
1.2
IW-34
1682913.20
929443.20
635
10
126
Saprolite/Transition Zone/Bedrock
1.2
IW-35
1681319.48
928632.14
755
10
59
Saprolite/Transition Zone/Bedrock
1.2
IW-36
1681044.90
928145.50
761
10
71
Saprolite
1.2
IW-37
1680961.30
927954.30
744
10
59
Saprolite
1.2
IW-38
1682874.47
929473.17
649
10
43
Saprolite/Transition Zone
1.2
IW-39
1682753.44
929435.93
704
10
84
Saprolite/Transition Zone
1.2
IW-40
1682602.16
929391.71
740
10
108
Saprolite/Transition Zone
1.2
IW-41
1681347.30
928895.70
729
10
223
Saprolite/Transition Zone/Bedrock
1.2
IW-42
1681302.20
928843.10
737
10
229
Saprolite/Transition Zone/Bedrock
1.2
IW-43
1681262.10
928798.00
740
10
232
Saprolite/Transition Zone/Bedrock
1.2
IW-44
1681222.10
928752.90
734
10
225
Saprolite/Transition Zone/Bedrock
1.2
IW-45
1681169.40
928707.80
742
10
232
Saprolite/Transition Zone/Bedrock
1.2
IW-46
1681124.30
928647.70
755
10
244
Saprolite/Transition Zone/Bedrock
1.2
IW-47
1680979.30
928664.80
751
10
242
Saprolite/Transition Zone/Bedrock
1.2
Horizontal Injection Wells
HZ-1 NA NA 595 1 10 1 60 Saprolite/Transition Zone/Bedrock 110
Notes:
All depths are approximated and may change depending on site conditions.
Flowrates are approximate and may change depending on site conditions.
DTW - depth to water
ft - feet
ft BGS - feet below ground surface
gpm - gallons per minute
Prepared by: GTC Checked by: YG
Page 1 of 1

TABLE 6-16
MODELED GROUNDWATER EXTRACTION WELL DETAILS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Well ID
Easting
Northing
Approximate
Ground Surface
Elevation
(feet)
Operational DTW
Maintained In
Well
(ft BGS)
Well
Depth
(ft BGS)
Targeted Flow Zones
Total
Simulated
Flow
(gpm)
Vertical Extraction Wells
EX-1
1681288.20
928942.50
722
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-2
1681219.00
928898.70
728
132
152
Saprolite/Transition Zone/Bedrock
0.8
EX-3
1681175.30
928855.00
725
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-4
1681115.30
928808.90
731
133
153
Saprolite/Transition Zone/Bedrock
0.8
EX-5
1681064.60
928762.80
742
143
163
Saprolite/Transition Zone/Bedrock
0.8
EX-6
1681392.71
928860.30
740
140
160
Saprolite/Transition Zone/Bedrock
0.8
EX-7
1681365.20
928815.70
749
147
167
Saprolite/Transition Zone/Bedrock
0.8
EX-8
1681334.50
928768.00
750
146
166
Saprolite/Transition Zone/Bedrock
0.8
EX-9
1681319.20
928723.80
750
146
166
Saprolite/Transition Zone/Bedrock
0.8
EX-10
1681305.60
928684.60
753
148
168
Saprolite/Transition Zone/Bedrock
0.8
EX-11
1681274.90
928611.40
745
139
159
Saprolite/Transition Zone/Bedrock
0.8
EX-12
1681244.30
928548.40
755
148
168
Saprolite/Transition Zone/Bedrock
0.8
EX-13
1681081.30
928592.80
762
158
178
Saprolite/Transition Zone/Bedrock
0.8
EX-14
1681324.50
928696.70
753
148
168
Saprolite/Transition Zone/Bedrock
0.8
EX-15
1681358.90
928672.60
761
154
174
Saprolite/Transition Zone/Bedrock
0.8
EX-16
1681339.80
928587.80
754
146
166
Saprolite/Transition Zone/Bedrock
0.8
EX-17
1681387.50
928624.90
763
154
174
Saprolite/Transition Zone/Bedrock
0.8
EX-18
1681375.70
928526.10
757
146
166
Saprolite/Transition Zone/Bedrock
0.8
EX-19
1681286.40
928649.60
745
139
159
Saprolite/Transition Zone/Bedrock
0.8
EX-20
1681234.30
928629.70
740
136
156
Saprolite/Transition Zone/Bedrock
0.8
EX-21
1681269.70
928705.60
743
139
159
Saprolite/Transition Zone/Bedrock
0.8
EX-22
1681262.60
928470.20
756
149
169
Saprolite/Transition Zone/Bedrock
0.8
EX-23
1681371.80
928444.20
757
146
166
Saprolite/Transition Zone/Bedrock
0.8
EX-24
1681322.90
928655.20
755
148
168
Saprolite/Transition Zone/Bedrock
0.8
EX-25
1681282.00
928561.90
745
139
159
Saprolite/Transition Zone/Bedrock
0.8
EX-26
1682318.20
929284.60
755
168
188
Saprolite/Transition Zone/Bedrock
0.8
EX-27
1681482.22
928678.80
770
125
145
Saprolite/Transition Zone/Bedrock
0.8
EX-28
1681481.12
928700.52
770
125
145
Saprolite/Transition Zone/Bedrock
0.8
EX-29
1681482.20
928722.49
765
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-30
1681474.86
928550.68
766
116
136
Saprolite/Transition Zone/Bedrock
0.8
EX-31
1681478.54
928595.60
768
119
139
Saprolite/Transition Zone/Bedrock
0.8
EX-32
1681478.54
928630.94
771
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-33
1681474.49
928537.43
766
116
136
Saprolite/Transition Zone/Bedrock
0.8
EX-34
1681477.43
928584.18
768
119
139
Saprolite/Transition Zone/Bedrock
0.8
EX-35
1681478.54
928623.21
771
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-36
1681481.12
928667.39
770
125
145
Saprolite/Transition Zone/Bedrock
0.8
EX-37
1681480.75
928713.78
770
125
145
Saprolite/Transition Zone/Bedrock
0.8
EX-38
1681481.51
928750.91
765
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-39
1681481.51
928790.91
758
120
140
Saprolite/Transition Zone/Bedrock
0.8
EX-40
1681525.32
928803.55
762
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-41
1681571.72
928801.45
764
124
144
Saprolite/Transition Zone/Bedrock
0.8
EX-42
1681611.56
928797.98
764
124
144
Saprolite/Transition Zone/Bedrock
0.8
EX-43
1681648.46
928794.95
767
125
145
Saprolite/Transition Zone/Bedrock
0.8
EX-44
1681682.52
928794.22
771
127
147
Saprolite/Transition Zone/Bedrock
0.8
EX-45
1681724.62
928792.12
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-46
1681775.22
928787.82
777
131
151
Saprolite/Transition Zone/Bedrock
0.8
EX-47
1681602.90
928798.57
764
124
144
Saprolite/Transition Zone/Bedrock
0.8
EX-48
1681582.10
928800.65
764
124
144
Saprolite/Transition Zone/Bedrock
0.8
EX-49
1681473.02
928524.17
766
116
136
Saprolite/Transition Zone/Bedrock
0.8
EX-50
1681475.96
928573.51
768
119
139
Saprolite/Transition Zone/Bedrock
0.8
EX-51
1681478.17
928614.37
771
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-52
1681472.65
928512.76
766
116
136
Saprolite/Transition Zone/Bedrock
0.8
EX-53
1681475.59
928560.99
766
116
136
Saprolite/Transition Zone/Bedrock
0.8
EX-54
1681478.17
928604.80
768
119
139
Saprolite/Transition Zone/Bedrock
0.8
EX-55
1681480.38
928648.61
771
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-56
1681481.48
928689.48
770
125
145
Saprolite/Transition Zone/Bedrock
0.8
EX-57
1681481.91
928733.61
765
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-58
1681482.91
928771.41
758
120
140
Saprolite/Transition Zone/Bedrock
0.8
EX-59
1681549.02
928799.75
762
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-60
1681593.72
928798.75
764
124
144
Saprolite/Transition Zone/Bedrock
0.8
EX-61
1681632.36
928797.28
767
125
145
Sap rolite/Transition Zone/Bedrock
0.8
EX-62
1681667.32
928794.02
771
127
147
Saprolite/Transition Zone/Bedrock
0.8
Page 1 of 2

TABLE 6-16
MODELED GROUNDWATER EXTRACTION WELL DETAILS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Well ID
Easting
Northing
Approximate
Ground Surface
Elevation
(feet)
Operational DTW
Maintained In
Well
(ft BGS)
Well
Depth
(ft BGS)
Targeted Flow Zones
Total
Simulated
Flow
(gpm)
Vertical Extraction Wells
EX-63
1681704.12
928792.02
771
127
147
Saprolite/Transition Zone/Bedrock
0.8
EX-64
1681750.82
928789.02
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-65
1681640.23
928796.83
767
125
145
Saprolite/Transition Zone/Bedrock
0.8
EX-66
1681502.33
928802.75
758
120
140
Saprolite/Transition Zone/Bedrock
0.8
EX-67
1681662.04
928794.19
767
125
145
Saprolite/Transition Zone/Bedrock
0.8
EX-68
1681673.38
928793.83
771
127
147
Saprolite/Transition Zone/Bedrock
0.8
EX-69
1681678.52
928793.66
771
127
147
Saprolite/Transition Zone/Bedrock
0.8
EX-70
1681688.27
928792.41
771
127
147
Saprolite/Transition Zone/Bedrock
0.8
EX-71
1681693.76
928792.59
771
127
147
Saprolite/Transition Zone/Bedrock
0.8
EX-72
1681698.90
928791.88
771
127
147
Saprolite/Transition Zone/Bedrock
0.8
EX-73
1681708.82
928791.18
771
127
147
Saprolite/Transition Zone/Bedrock
0.8
EX-74
1681714.85
928791.00
771
127
147
Saprolite/Transition Zone/Bedrock
0.8
EX-75
1681719.63
928791.00
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-76
1681730.44
928790.11
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-77
1681735.40
928790.11
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-78
1681739.65
928790.11
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-79
1681745.68
928788.87
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-80
1681754.89
928788.87
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-81
1681759.68
928787.99
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-82
1681763.93
928787.81
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-83
1681767.65
928787.81
774
129
149
Saprolite/Transition Zone/Bedrock
0.8
EX-84
1681771.90
928787.63
777
131
151
Saprolite/Transition Zone/Bedrock
0.8
EX-85
1681779.35
928786.92
777
131
151
Saprolite/Transition Zone/Bedrock
0.8
EX-86
1681783.78
928786.57
777
131
151
Saprolite/Transition Zone/Bedrock
0.8
EX-87
1681787.14
928786.21
777
131
151
Saprolite/Transition Zone/Bedrock
0.8
EX-88
1681481.48
928657.45
771
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-89
1 1681622.63
928798.26
767
125
145
Saprolite/Transition Zone/Bedrock
0.8
EX-90
1681479.27
928638.30
771
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-91
1681560.75
928800.36
762
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-92
1681481.70
928741.62
765
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-93
1681482.33
928761.83
765
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-94
1681537.71
928800.05
762
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-95
1681482.33
928782.11
758
120
140
Saprolite/Transition Zone/Bedrock
0.8
EX-96
1681515.48
928803.17
762
123
143
Saprolite/Transition Zone/Bedrock
0.8
EX-97
1681748.09
928612.99
774
124
144
Saprolite/Transition Zone/Bedrock
0.8
EX-98
1681738.09
928602.19
774
124
144
Saprolite/Transition Zone/Bedrock
0.8
EX-99
1681731.75
928591.70
774
124
144
Sap rolite/Transition Zone/Bedrock
0.8
EX-100
1681742.60
928607.00
774
124
144
Saprolite/Transition Zone/Bedrock
0.8
EX-101
1681734.30
928596.20
774
124
144
Saprolite/Transition Zone/Bedrock
0.8
EX-102
1681728.50
928585.40
774
124
144
Saprolite/Transition Zone/Bedrock
0.8
EX-103
1682698.22
929347.70
722
86
106
Saprolite/Transition Zone/Bedrock
0.8
EX-104
1682578.24
929276.28
751
99
119
Saprolite/Transition Zone/Bedrock
0.8
EX-105
1682826.77
929390.55
650
26
46
Saprolite/Transition Zone/Bedrock
0.8
EX-106
1681930.81
928557.94
742
20
40
Saprolite
0.8
EX-107
1681911.35
928500.94
747
25
45
Saprolite
0.8
EX-108
1681770.94
928282.67
748
32
52
Saprolite
0.8
EX-109
1681839.06
928366.08
750
32
52
Saprolite
0.8
EX-110
1681877.98
928445.33
745
25
45
Saprolite
0.8
EX-111
1681634.40
929008.60
745
36
56
Saprolite
0.8
EX-112
1681171.64
928093.38
765
54
74
Saprolite
0.8
EX-113
1681164.012
928005.4152
758
49
69
Saprolite
0.8
Notes:
All depths are approximated and may change depending on site conditions.
Flowrates are approximate and may change depending on site conditions.
DTW - depth to water
ft - feet
ft BGS - feet below ground surface
gpm - gallons per minute
NA - Not applicable
Prepared by: GTC Checked by: YG
Page 2 of 2

u
TABLE 6-17
EFFECTIVENESS MONITORING PLAN ELEMENTS
CORRECTIVE ACTION PLAN UPDATE
BELEWS CREEK STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELEWS CREEK, NC
Effectiveness Monitoring Plan (EMP) Post -Closure Monitoring Plan (PCMP)
Implemented 30 days after CAP Approval Implemented after completion of ash basin closure activities
EMP Groundwater Well Monitoring Network
(flow paths downgradient, locations downgraident and sidegradient,
and background of ash basin)
Downgradient
Downgradient
Downgradient
Downgradient and
1
Background
Flow Path 1
Flow Path 2
Flow Path 3
Sidegradient
CCR-2D
GWA-20BR
CCR-6S
EXOB-1
BG-IS
CCR-2S
GWA-20SA
CCR-6D
EXOB-2
BG-1D
GWA-IOSA
GWA-20D
CCR-6BR*
GWA-16S
BG-2S
GWA-10D
GWA-11S
MW-200BR
GWA-16DA
BG-2D
GWA-19D
GWA-11D
MW-200D
GWA-16BR
BG-2BRA
GWA-19SA
GWA-21S
MW-200S
GWA-17S
BG-3S
GWA-19BR
GWA-21D
GWA-24BR
GWA-17D
BG-3D
GWA-31S
GWA-27S
GWA-24D
GWA-18SA
MW-202S
GWA-31D
GWA-27D
GWA-24S
GWA-18D
MW-202D
GWA-27BR
GWA-1S
MW-202BR
CCR-13S
GWA-ID
CCR-13D
GWA-1BR
CCR-13BR
GWA-30S
GWA-30D
GWA-32S
GWA-32D
M W -204S
M W -204D
PCMP Groundwater Well Monitoring Network
(background, downgradient of ash basin)
A PCMP will be implemented at the Site in accordance with
G.S. Section 130A-309.214(a)(4)k.2 after completion of
ash basin closure activities.
EMP Groundwater Quality',O PCMP Groundwater Quality
(Semi -Annual Sampling Frequency) (Sampling frequency to be determined)
Alkalinity Borons Iron Nitrate + Nitrite Sulfate
Aluminum
Calcium Lithium
Potassium Thallium
Parameters and sampling frequency to be included in the PCMP in
Arsenic
Chlorides Magnesium
Total Dissolved
Sodium
accordance with G.S. Section 130A-309.214(a)() 4 k.2 when
Solids'
submitted.
Beryllium
Cobalt Manganese
Strontium Total Organic
Carbon
Bicarbonate
Ferrous Iron
CMP and PCMP Groundwater Field Parameters
Water Level Specific Conductivity Temperature
PH Oxidation Reduction Potential Dissolved Oxygen
Annual Effectiveness Monitoring Evaluation and Reporting
1) Summary of annual groundwater monitoring results
2) Evaluate statistical concentration trends
2) Comparison of observed concentrations to model predictions
3) Evaluation of compliance with applicable Standards
4) Evaluation of system performance and effectiveness
4) Recommend plan adjustments, if applicable, to optimize the remedial action
5-Year Performance Review Reporting
1) Update background analysis
2) Confirm Risk Assessment assumptions remain valid
3) Re-evaluate effectiveness of technology
4) Verify modeling results, update model if needed
5) Modify corrective action approach, as needed, to achieve compliance goal established
30 days after CAP approval, the EMP will be implemented at the Site and will continue until there is
a total of three years of data confirming COIs are below applicable Standards at or beyond the
compliance boundary, at which time a request for termination of active remediation will be filed
with NCDEQ.
If applicable standards are not met, the EMP will continue and transition to post -closure monitoring
if necessary.
Annual Evaluation and Reporting:
1) Summary of annual groundwater monitoring results
2) Evaluate statistical concentration trends
2) Comparison of observed concentrations to model predictions
3) Evaluation 02L compliance
4) Recommend plan adjustments, if applicable
At a freguencv no greater than 5 years:
1) Update background analysis
2) Confirm Risk Assessment assumptions remain valid
3) Verify model results, update if needed
After ash basin closure and following ash basin closure certification,
a PCMP will be implemented at the Site for a minimum of 30 years
in accordance with G.S. Section 130A-309.214(4)(k)(2).
Reguest for termination:
If groundwater monitoring results are below applicable Standards at
the compliance boundary for three years, Duke Energy will request
completion of corrective action in accordance with G.S. Section 130A
309.214(a)(3)b. If groundwater monitoring results are above
applicable Standards, the PCMP will continue.
Prepared by: ALA Checked by:
1 Approved background groundwater monitoring locations
' Geochemirally non -reactive constituents fi.e.. conservative corrective action COW that best depict the area extent of the plume: monitors plume stability and phvsical afte.u.ti.n
3 The number of monitoring wells and parameters may be adiusted based on additional data and the effects of corrective action.
° Groundwater standards may be modified over time in accordance with 02L .0106(k)
* Proposed new well for effectiveness monitoring
Italicized parameters - parameters for water quality to evaluate monitoring data quality