NCG120101_COMPLETE FILE - HISTORICAL WITH MOD_20140606

STORMWATER DIVISION CODING SHEET
NCG PERMITS
PERMIT NO.
/v
DOC TYPE
2, HISTORICAL FILE
❑ MONITORING REPORTS
DOC DATE
❑ (9b 14 D to D Cp
YYYYM MDD

f
' DUKE
ENERGY®
PROGRESS
Mr. Dave Parnell
North Carolina Division of Energy, Land and Mineral resources
Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 276011
File: 12520 R
12566 C
Subject: Mayo Monofill Project
Surface Water sampling results
COC#: NCG120101
Person County
Dear Mr. Parnell:
Mayo Steam Plant
Duke Energy Progress
10660 Boston Road
Roxboro, NC 27574
JUN 0 s b
JUN - s w Di
2014
NC C61111 R410�h RA9ionai offloe
In accordance with the requirement found in the subject permit, enclosed please find results from the
initial surface water sampling done at the Mayo monofill. These sampling results are from the "pre-
operational" samples taken in accordance with the Surface Water Quality Monitoring Flan required by
the North Carolina Division of Solid Waste. Future sample results will be sent to you using this same
format.
Please contact Mr. Shannon Langley at [phone] if there are any questions with this submittal.
I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true,
accurate, and complete. / am aware that there are significant penalties for submitting false
information, including the possibility of fines and imprisonment far knowing violations.
Sincerely,
C�
William J. cker, Plant Manager
Mayo Electric Generation Plant
WJT/esl
www.duke-energy.com

M
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31y REVIEW $OUNDARYlp �° q A �°p Yry ►� t S
r �0 (APPROXIMATE).'. O1 1'
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UKE Cy ..I DENERGY
PROPERTY BOUNDARY
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1 ° 490 g0tii 470
.490
490�
300o
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NOTES:
a°'° - L BASE mAP PROVIDED BY DUKE ENERGY,
490 '�. 2. CONTOURS FOR PHASE I ARE FROM GRADING PLAN - TOP
OF LINER DRAWING NO. IFC-27 (GOLDER ASSOCIATES. INC.).
or Swri'
4@0 7y ��, .�� r Y GRD UN DWATfR MONITORING WELL
` r - '/ 1�7 - ♦ SURFACE WATER SAMPLING LOCATION
/ LIN17 OF �WASTE (APPFOA.) LM1 N'3?ILILL RE4IEN BOiNOARY (AM'ROl(.)
l 500 h J •.���, — LANDFILL COMPLIANCE BOUNDARY (APP--m )
DOK ENERGY PROPERTY BouNDARY
5�d I' Ir STREAM
•�, .;.�' Exlsl INc GROUND SURFACE CONTOUR
/ 530 �' 1\{'-) p PRASE I GROJND SURFACE CONTOUR
PRASE I TOP OF LINER CONTOUR
SCALE (FEET)
300 D 300 600
HtYi Ggix.hq Inc.
01 If+Gr0iK4
I b—N~. FUI Iy
440 36 C-w R-1 CJGMA NC 28202
SAMPLE LOCATIONS
MAYO ELECTRIC GENERATING PLANT
CCP MONOFILL, PHASE 1
PERMIT NO. 7305
DATE
JUNE 5, 2014
FIGURE 2

Table 1- Field Data Parameters - July 2013
Duke Energy/Mayo Electric Generating Plant
CCP Monofill, Phase 1- Permit No. 7305
WELL
DEPTH TO
WATER
AVERAGE
WELL
EVAC
SPECIFIC
SAMPLE
DEPTH
WATER
ELEV.
PURGE
PUMP RATE
VOLUME
VOLUME
EVAC
TEMP
CONDUCTANCE
pH
TURBIDITY-
ORP•
DO*
DATE
SAMPLE ID
(feet!
(feet)
(feet)
APPEARANCE
ODOR
METHOD
(mi./min)
(gallons)
(gallons)
(yes/no)
(deg C)
(umho/cm)
05U)
(NTU)
�rnV_NHEf
(mg l-1
7/10/2013
MW-1
40.26
18.40
4BL78
Clear withFnes
None
LF
100
3.57
1.00
No
19.2
335.5
6.1
14.8
129.9
31.6**
7/10/2013
MW-2
74.97
40,82
42L33 Clear with Air Bubbles
None
LF
120
5.57
1-00
No
18.4
636
6.9
8.3
278
8.96
7/10/2013
MW-3
53.26
43.85
392.27
Clear
None
LF
160
1.53
1.25
No
18,5
802
6.a
6.4
158
7.77
7/10/2013
MW-4
38.90
35.44
388.28
Clear
None
LF
8o
0.56
0.25
No
21,6
921
6.5
7.3
-606.0*1
5.79
7/10/2013
MW-5
51.89
24.90
407.98
Clear
None
LF
100
4AO
0.25
No
24,4
586
7.2
1.6
226
8.17
7/10/2013
SW-1
N/A
N/A
N/A
Not Noted
None
N/A
N/A
N/A
N/A
N/A
24.3
247.3
6.7
N/A
-63.8**
4.09
7/10/2013
SW-2
N/A
N/A
N/A
Not Noted
None
N/A
N/A
N/A
N/A
N/A
25.4
146.8
7,4
N/A
-97.4**
7.22
7/10/2013
SW-3
N/A
N/A
N/A
Not Noted
None
N/A
N/A
N/A
N/A
N/A
26.0
109.7
6.6
N/A
-113.6'*
5.74
Notes:
L Purge Methods: LF-Low Flow. LF(M)-Low Flow Modified, CP-Conventionat Purge (3-5 well volumes). NP-No Purge IHyeraSleeve). EOP-Equipment Only Purge. Average puma rate applicable to LF and LFIM)purging Only.
2. Field sampling performed by SynTena Corporation personnel.
3. EVAC indicates whether the water level in the well was drawn down to the level of the pump during purging
4. umha/cm indicates micro mhos per centimeter.
5. mtlrNn Indieates milliliters per minute.
6. SU Indicates Standard Units.
7, NTU indleatts NepherlomeblC Turb6ty Units.
8, mV-NHE indicateS millivolts -Normal Hydrogen Flectrode.
9. mg/L indicates milligrams per lite,,
10. N/A indicates not apphi;able.
11. ' SynTerra Corporation Is not NC-certlfled far these parameters. Data collected for Information purposes only.
12. " Indicates unusual readings noted during data collection. Meter probe was pkely m6lfunc9oning during field measurements.
13. Information provided by Duve Energy an October 2. 2013.
Page 1 of 1

Table 3 - Surface Water Field and Analytical Results - July 2013
Duke Energy/Mayo Electric Generating Plant
CCP Monofill, Phase 1- Permit No. 7305
Sample Date: July 10, 2013 Laboratory Certificate Codes:
SynTerra Corporation Field a5591
Field Sampling performed by SynTerra Corporation Duke Energy Analytical Laboratory #248
Pace Analytical Services. Inc. p40
Parameter
SWS ID
Units
Certlflcaie
(title
Sample Location
SWSL
15A NCAC 28
7305 SW-1
7305 SW-2
7305 SW-3
Field pH
320
SU
5591
6.7
7.4
66
NE
66-9.0
Specific Conductance
323
umho/cm
5591
247
147
110
NE
NE
Temperature
325
'C
5591
24.30
25.40
26.00
NE
NE
Arsenic
14
Pg/L
248
1.49 J'
0.138 1
0.561 1
10
10
Barium
15
µgyL
248
139 1
27.2 1'
128 1
100
200.000
BOD
316
I'87L
40
2,500 U
2,000 U
102.000 U
NE
NE
Boron
429
1L
248
5.04 1
13.3 1
4.1 J
NE
NE
Cadmium
34
µg/L
248
0.101 U
0.101 U
0.101 U
1
2
Chloride
455
1
248
4.490
6,130
3,830ENE230.000
Chromium
51
1
248
2.49 1
0.5 U
-311
50
COD
317
pl?/L
248
16,700 1
5,110 J
3,780
NE
Copper
54
WL
248
3.01 J
1.19 1
-48.7
1
Fluoride
312
µg/L
248
257 1'
144 1'
158
LS00
Iron
340
µg/L
248
16.700 1
707 1
3L600
LOGO
Lead
131
µgJL
248
L02 1'
0.074 1
3.22
25
Manganese
342
1
248
- 1.970 1
91 1
455 1
50
NE
Mercury
132
WL
248
0.006 U
0.006 U
0.02 1
0.2
0.012
Nickel
152
1
248
2.11 1
0.5 U
22.5 I'
50
88
Nitrate lae Nitrogen)
303
1
248
2.830 J'
94.8 J'
922 J'
10,000
NE
Selenium
183
ug/L
248
J-28 J'
0.999 J
1.65 J'
10
5
Silver
154
pgyl
248
0.7 U
0.7 U
0.7 U
SO
0.06
Sulfate
315
uFJ1
248
16.200 J'
6.720 J'
4,770 J'
250,000
NE
Thallium
194
pg71
248
0.133 U
0.133 U
OA33 U
5.5
0.47
TOC
357
µgyL
248
12.100
5.630
3.680
NE
NE
Total Dissolved Sotids
311
PFJ�
248
220.000
104,0p0
266.000
NE
NE
Zinc
213
❑g/L
248
5.55 J'
2.6 U
33.1 - 1
10
50
Notes:
1. Concentrations presented in micrograms per titer (pli
2. SWS $0 Is the SaUd Waste Section Idemblimbon Number.
J. SWSL Is the Solid waste Secbon Umi6 NCDENR defines the SWSL as the lowest amount of III In a sample mat can be quantmtNely determined with suitable precision and accuracy.
4. 15A NCAC 2B Standard I$ from'Nprtn Carolina Administrative Code, Tide ISA: Depami at EmAfunment and Natural Resources, Subchapter 2B, Surface Water and Wetland Standards,' (last amended on May 1. 2007) for Class C waters.
5. The perennlat streams to Hi River are rtassltled as Class C waters. Regulation 15A NCAC 021 provides water quality standards for Class C waters.
Reter"Ce 15A NCAC 2B .0200 ClassifIcations and Water Quality Standards Applicable to Surface Waters and Wetlands of N.C. Amended ElfectNe: May 1, 2007.
6. Grayed values Indicate values that attain or exceed the SWSL Standard.
7. Bold values indicate values that attain or exceed the 15A NCAC 23 Standard.
8. NE Indicates not established. Blank Cells Indicate that there Is no IntmmaEion relevant to the respective row.
9. Qualifiers in nun -italicized text are laboratory data qualifiers or lags'. '0' is used to identify resWis not detected at concentrations which attain the laboratory's method detection limit (MDLL
'J' is used to identify estimated concentrations whkeh attain or aimed the MDt but are IeSs than the iaboratorys method reporting limit LMRL}.
An Ralipzed J'-flag i8 a data qualifier, added M HDR to Indicate concentrations which attain or exceed the laboratorys MRL but are less than the SWSL
10. According to the ConsStuent Loak-up webpage on the NCDENR Division of Waste Management webpage. mere Is no SWSL Standard for chDride associated with CAS number 16887-00-5. which Is the CAS reported by the laboratory
for the analyses completed. Therefore, the SWSL Standard listed Is for the chloride with CAS number Sw301 as specified on the Consbtuent Lpok-up webpage (last updated June 13, 2011).
11. SU Indicates Standard Units.
12. unni Indicates micromhos per centmeter.
13. BOD indicates biochemical oxygen demand. COO Indicates chi oxygen demand. 70C Indicates total organic carbon.
14. Anatyiiral results obtained from Electronic Data Deliverable ii provided by Duke Energy on October 2, 2013.
Page 1 of 1

Table 5 - Field and Analytical Results that Equal or Exceed
15A NCAC 2B Surface Water Quality Standards - July 2013
Duke Energy/Mayo Electric Generating Plant
CCP Monofill, Phase 1- Permit No. 7305
Sample Date: July 10.2013
Field Sampling performed by SynTerra Corporation
Parameter
Sample ID
Result
Units
2B Standard
Historical Concentrations
Cause and Signiflcance
Copper
SW-3
48.7
pg/L
7
48.7
This is the first sampling event at SW-3.
Iron
SW-1
SW-3
16,700
31.60o
yg/L 1000
pg/L
16.700
31.600
This is the first Sampling event at SW-1.
This is the first sampling event at SW-3.
Notes:
1, 15A NCAC 2B Standard is from 'North Carolina Administrative Code, Title 15A: Deparment of Environment and Natural Resources, Subchapter 2B -Surface Water and Wetland Standards,' [last amended on May 1, 2007) for Class C waters.
2. Analyticai results obtained from Electronic Data Delivefobte (EDD) provided by Duke Energy on October 2, 2013.
3. kg/L indicates micrograms per liter.
4. Historical concentrations based on data in Duke Energy analytical results database.
Page 1 of 1

Table 6 - Field Data Parameters - August 2013
Duke Energy/Mayo Electric Generating Plant
CCP Monoftll, Phase 1- Permit No. 7305
WELL
DEPTH TO
WATER
AVERAGE
WELL
EVAC
SPECIFIC
SAMPLE
DEPTH
WATER
ELEV.
PURGE
PUMP RATE
VOLUME
VOLUME
EVAC
TEMP
CONDUCTANCE
pH
TURBIDITY*
ORP•
DO -
DATE
SAMPLE ID
(feet)
(feet)
(feet)
ODOR
METHOD
(mL/min)
(galrons)
(gallons)
(yee/no)
(degC)
(umho/em_)___-__
jSU)
;NTU)
{mV-NHE)
(mg/L)
9/21/2013
MW-1
40.26
18.53
481.65
_APPEARANCE
Clear
None
LF
90
3.54
1.00
No
18.8
330.6
6.3
14.1
253
1.63
8/21/2013
MW-2
76.27
42.07
420.08
Clear
None
LF
140
5,37
1.50
No
18.7
668
7.1
10.8
178.9
3.29
8/2W2013
MW-3
53.2b
43.69
392.43
Clear
None
LF
170
1.56
1.50
No
16.8
798
6.9
7,94
159
3.24
8/21/2013
MW-4
38.90
35.65
388.07
Cleat
None
LF
140
0.53
1.00
No
18.3
974
6.6
9.12
112.3
1.40
8/21/2013
MW-5
50.83
20.94
411.94
Clear
None
LF
100
5.05
0.25
No
18.3
572
7.4
5.5
7.2
0.39
8/21/2013
SW-1
N/A
N/A
N/A
Clear with Iron Flocs
None
N/A
N/A
N/A
N/A
N/A
21.4
233.7
7,0
21.9
-9.6
4.00
8/22/2013
SW-2
N/A
N/A
N/A
Clear
None
N/A
N/A
N/A
N/A
N/A
22.3
120.4
7.5
4.29
149.2
6.21
9/22/2013
SW-3
N/A
N/A
N/A
Light Tan
None
N/A
N/A
N/A
N/A
N/A
23.6
115
7.3
43.2
146.2
5.93
Notes:
1. Purge Methods: LF-Low Flow, LF(M)-Low Flow Modified, CP-Conventional Purge (3-5 well volumes). NP-No Purge IHydraSleevel. EOP-Equipment Only Purge. Average pump rate applicable to LF and LPSM}purging only.
2. Field sampling performed by SynTerra Corporator personnel.
J. EVAC indicates whether the water level in the well was drawn down to the level of the pump during purging.
4. umho/cm indicates micro mhos pef centimeter.
5. mt/min indicates milliliters per minute.
6. SU indicates Standard Units.
7. NTU indicates Nephelometric Turbidity Units.
8. mV-NHE indicates millivolts -Normal Hydrogen Electrode.
9. mg/L indicates migigrams per liver.
10. N/A indicates not applicable,
11. ` SynTerra Corporation is not NC certfled for these parameters. Cata Collected for information purposes only.
12. Information provided by Duke Energy en October 2, 2013.
Page 1 of 1

Table 8-Surface Water Field and Analytical Results -August 2013
Duke Energy/Mayo Electric Generating Plant
CCP Monofill, Phase 1- Permit Na. 7305
Sample Date: August 21 and 22. 2013 Laboratory Certificate Codes:
SynTena Corporation Field #5591
Field Sampling performed by SynTena Corporation Duke Energy Analytical Laboratory #248
Pace Analytical Services, Inc. #40
Parameter
Sws in
Units
Certlfkete
Code
Sample Locatton
SWSL
15A NCAC 2B
7305 SW-1
I 7305 SW-2
7305 Si
Field pH
320
sU
5591
7.0
7.5
7.3
NE
6.0-9.0
Specific Conductance
323
umho/Cm
5591
233.7
120.4
115
NE
NE
Temperature
325
'C
5591
21-4
22.3
23.6
NE
NE
Arsenic
14
q/t.
248
0.695 1
0.234 1
1.69 1'
10
10
Barium
15
ug/L
248
88.2 1'
27.7 J'
34.6 J'
100
200,000
Boo
316
pi
4D
2.000 U
2,000 U
2.000 U
NE
NE
Baron
428
wt.
248
3.3 U
10.2 1
3.3 U
NE
NE
Cadmium
34
ug/L
248
0.101 U
0.101 U
0.101 U
1
2
Chloride
455
41VL
248
5.090
4,760
3,630
NF
230.000
Chromium
51
pg/L
248
0.664 1
0.5 U
2.59 1
10
50
COD
317
AVL
248
15.400 1
16,700 1
17,000 1
NE
IN
Copper
54
pg/L
248
1 U
L82 1
4.29 1
10
7
Fluoride
312
pg/L
1 248
202 1'
154 J
149 J'
2000,
1,800
Iron
340
4PJL
248
8.110 1
1;100 1
- 2.750 1
300
1.000
Lead
131
ugrL
248
0.123 1
0.19 1
0.279 1
10
25
Manganese
342
pg/L
248
1,280 1
-182 1
109 ""1
50
NE
Mercury
132
O L
248
0.006 U
0.006 U
C.006 U
0.2
0.012
Nickel
152
vg/L
248
0.518 1
0.5 U
1,63 1
50
88
Nitrate (as Nitrogen}
303
pg/L
248
111 J'
123 1'
127 J'
10.000
NE
Selenium
183
µg/L
248
0.238 1
0.246 1
0.395 1
10
5
Silver
184
pg/L
248
0.7 U
0.7 U
0.7 U
10
01
Sulfate
315
WL
248
2,970 J'
5.810 J'
5.140 J'
250.000
NE
Thallium
194
pglL
248
0.133 U
0.133 U
0.133 U
5.5
0.47
Toc
357
µg/L
2a8
5,570
6,770
4.480
NE
NE
Total Dissolved Solids
311
pg/L
248
158.000
99'000
115.000
NE
NE
Zinc
213
PYJL
248
2.6 U
2.6 U
8.78 J'
10
50
Notes:
1- Coneenbations presented In micrograms per titer (ug/Ll.
2. SWS ID Is the Solid Waste Section Identification Number.
3. SWSL Is the Solid Waste Section Limit NCDENR defines the SWSL as the lowest amount of analyte In a Sample that can be quantitatively determined with suitable precision and ACCuracy.
4. 15A NCAC 2B Standard is from "North Carolina Adminlstrative Code, Title 15A: Deparment Of Environment and Natural Resources, Subchapter 26 - Surface Water and Wetland Standards," (last amended on May 1, 2007) for Class C waters.
5. The perennial streams to Hyco River are classified as Class C waters. Regulation 15A NCAC 02D .0211 provides water quality standards lot Class C waters,
Ref riencer 15A NCAC 28 .0200 Classilderion5 and Water Quality Standards Applicable to Sthi Waters Anil Wetlands of N.C. Amended Lffective: May 1, 2007.
6. Grayed values indicate values that attain or exceed the SWSL Standard.
7. Bold values indicate values that attain Or exceed the 15A NCAC 28 Standard.
S. NE Indicates net established. Blank cells indicate that there is no information relevant to the restiectwe raw,
9. Qual#lers in noMtaticized text are laboratory data pualitiers or lag5'.'U' i5 u500 to Identify results not detected at concentrations Which attain the laboiatoys method detection limit (MOIL).
'1' Is used to identify estimated concentrations which attain of exceed the MDL but are less then the laboratory's method teperting limit (MRL).
An italiazed 1'-flag Is a data qualifier. priced by HDR to Indicate concentrations which attain or exceed the IAooratery's MRL but are less than the SWSL.
10. According to the Constituent Lookup wehpage On the NCDENR Division of Waste Management wehpage, there is no SWSL Standard tar charade a550pidtee with CAS number 16887-00,6, which is the CAS reported by the laboratory
for the analyse5 compretad. Therefore, the SWSL Standard listed Is for the chloride with CAS number SW301 as speafied on the Constituent Lookup wehpage (last updated June 13. 2011).
It. SU indicates Standard Units.
12. umho/cm Indicates mlcromhos per cent rneter,
13. HOD indicates blochemical Oxygen demand. COD Indicates chemical oxygen demand. TOC indicates total organic cartiun.
14. Analytical results obtained from Llectronac Data DOINerable JEDD) provided by Duke Energy on October 2, 2013.
Page 1 of 1

Table 10 - Field and Analytical Results that Equal or Exceed
15A NCAC 2B Surface Water Quality Standards - August 2013
Duke Energy/Mayo Electric Generating Plant
CCP Monofill, Phase 1- Permit No. 7305
Sample Oates: August 21 and 22. 2013
Field Sampling performed by SynTerra Corporation
Parameter
Sample ID
Result
Units
28 Standard
Historical Concentrations
Cause and Significance
SW-1
6,110
Ug/L
5,110 - 16.700
Iron concentration at SW-1 is the lowest concentration measured over the period of monitoring. This is the second monitoring
avant at SW-1. Turbidity measured at 21.9 NTlls.
SW-2
1.100
IjWL
707 - 1,100
Iron concentration at SW-2 is the highest concentration measured over the period of monitoring. This is the second monitoring
Iron
1,000
event at SW-2.
SW-3
2.750
Ug/L
2.700-31.600
bon concentration at SW-3 is the lowest concentration measured over the period of monitoring. This is the second monitoring
event at SW-3. Turbidity measured at 43.2 NTUs.
Notes:
1. 15A NCAC 28 Standard is from 'North Carolina Administrative Code, Title 15A: Deparment of Environment and Natural Resources, Subchapter 2B - Surface Water and Wetland Standards,' (last amended on May 1. 2007( for Class C waters.
2. Analytical results obtained from Electronic Data Deliverable (EDD) provided by Duke Energy on October 2, 2013.
3. pgJL indicates micrograms per liter.
4. Historical Concentrations based on data m Duke Energy analytical results database.
Page 1 of 1

Table 11- Field Data Parameters - November 2013
Duke Energy/Mayo Electric Generating Plant
CCP Monoflll, Phase 1- Permit No. 7305
WELL
DEPTH TO
WATER
AVERAGE
WELL
EVAC
SPECIFIC
SAMPLE
DEPTH
WATER
ELEV.
PURGE
PUMP RATE
VOLUME
VOLUME
EVAC
TEMP
CONDUCTANCE
pH
TURBIDITY`
ORP-
DO"
DATE
SAMPLE ID
feet
fees
feel
APPEARANCE
ODOR
METHOD
m min
dons(gallons)
nv
de C
umho cm
SU)
(NTU)
(mV-NH
m
11/14/2013
NW-1
40.26
19.78
480.40
Clear with fines
None
LF
100
3.34
1.20
No
15
324
6.3
23
293
2.3
11/14/2013
MW-2
76.27
42.92
419.23
Clear
None
LF
130
5.23
1.20
No
16
682
7.0
9.7
125
1.5
11/14/2013
MW-3
53.26
43.81
392.31
Clear
None
LF
200
1.54
1.20
No
15
763
5.9
8.5
107
1.7
11/14/2013
MW-4
38.90
35.09
336.63
Clear
None
LF
105
0.62
1.20
No
16
991
6.6
8.2
4
0.5
11/14/2013
MW-5
50.83
21.23
411.65
Clear
None
LF
110
5.00
0.24
No
16
570
7.3
5.9
78
0.4
11/15/2013
SW-1
N/A
N/A
N/A
Clear with Iron flocs
None
N/A
N/A
N/A
N/A
N/A
7
194
6.9
36
81
5.8
11/15/2013
SW-2
N/A
N/A
N/A
Clear
None
N/A
N/A
N/A
N/A
N/A
6
150
7,0
2.9
179
9.9
11/15/2013
SW-3
N/A
N/A
N/A
Clear with flocs
None
N/A
N/A
N/A
N/A
N/A
6
150
6.8
6.6
84
6.9
Notes:
1, Purge Methods; LF-Low Flow, LF(M)-Low Flow Modified. CP- Con ventional Purge 13.5 well volumes). NP=No Purge (Hydra Sleeve f EOP-Equipment Only Purge, Ave rago pump rate applicahle to LF and LF{M}purging only.
2, Field sampling performed by Syn7erra Corporation personnet.
3. EVAC indicates whether the water level in Eire well was drawn down to the level of the pump during purging
4. umho/em Indicates micro mhos per centimeter.
5. mL/mm Indicates milliliters oar minute.
6. SU indicates Standard Units.
7, NTU indicates Nephelon is Turbidity UnitS.
S. mV-NHE indicates millivolLS-Normal Hydrogen Electrode.
9. mgit indicates milligrams per titer.
10. N/A indicates not applicable.
11. • SynTerra Corporation is not NC -certified for these parameters. Data collected for information purposes only.
12. Infomration provided by Duke Energy on December 10. 2013.
Page 1 of 1

Table 13 - Surface Water Field and Analytical Results - November 2013
Duke Energy/Mayo Electric Generating Plant
CCP Moll Phase 1 - Permit No. 7305
Sample Date: November 14 and 15, 2013 Laboratory Certificate Codes:
SynTerra Corporation Field a5591
Field Sampling performed by SynTerra Corporation Duke Energy Analytical Laboratory #248
Pace Analytical Services. Inc. u40
Parameter
SWS ID
Units
CertJFlcate
Code
Sample Location
SWSL
15A NCAC 213
7305 SWd
7305 SW-2
7305 SW-3
Field RH
320
Su
5591
6.9
7.0
6.8
NE
6.0-9.0
Specific Conductance
323
umhol
5591
194
150
150
NE
NE
Temperature
325
'C
5591
7.0
6.0
6.0
NE
NE
Arsenic
14
µill
248
0.376 J
0.078 U
0.373 J
SO
10
Banum
15
µgJL
248
69.7 J,
27.6 J,
41.1 P
100
200,000
BOD
316
µgJL
40
2,000 U
2,000 U
2.700
NE
NE
apron
428
µill
248
3.3 U
3.3 U
3.3 U
NE
NE
Cadmium
34
pill
248
0.101 U
0.101 U
0.101 U
1
2
Chlonde
455
µill
248
5.500
7,170
6,480
NE
230,000
Chromium
51
µill
248
0.5 U
0.5 u
0.5 U
10
50
COD
317
Pill
248
9,760 1
9,120 J
11,100 J
NE
NE
Copper
54
µill
248
1 U
1 U
1 U
10
7
Fluonde
312
µill
248
181 J,
140 J,
128 J.
2.000
1,800
Iron
340
1
248
-3,740 1
85"6 P
L020" I
300
LODO
Lead
131
1
248
0.239 J
0.065 u
0.065 U
10
25
Manganese
342
lug1L
248
--1.110 -1
22,6 1.
201 "I
50
NE
Mercury
132
ug/1
248
0.006 U
01006 U
0,006 U
0.2
0.012
Nickel
152
µill
248
0.5 U
0.5 U
0.5 U
50
58
Nitrate (as Nitrogen)
363
µg/L
248
21.1 J
5,4 u
420 J'
10.000
NE
Selenium
183
µill
248
0.142 J
0,101 J
0,092 U
10
5
Silver
184
µg/1
248
0.7 U
017 U
0.7 U
10
0.06
Sulfate
315
µill
248
4.000 1'
11.500 P
15.700 J'
250.000
N£
Thallium
194
pg/L
248
0.133 U
0,133 u
O"133 U
5.5
0.47
TOC
357
1
248
3.380
4,260
5,260
NE
NE
Total Dissolved Solids
311
ge/L
248
161-000
105.000
111.000
NE
NE
Zinc
213
µg/L
248
26 U
2.6 U
2.6 U
SO
50
Notes:
L Concentrations presented In micrograms per liter Ipy/L).
2. SWS ID IS the Solid Waste Section Identification Number.
3. SWSIL Is the Solid Waste Section LJmii. NCDENR de}Ines the SWSL as me lowest amount of anal In a sample that can be quantitatively determined with suitable precision and accuracy.
4. 15A NCAC 23 Standard is from 'North Carolina Administrative Cade, Title 15A: Debarment of Environment and Natural Resources. Subchapter 2B -Surface Water and Wetland Standards," (last amended on May 1. 2007) for Class C waters.
5. The perennial streams to Hyeo River are classified as Class C waters. Regulation 15A NCAC 02B .0211 provides water quality standards for Class C waters.
Reference 15A NCAC 2B .0200 Classltications and Water Quality Standards Appllcable to Surface Waters and W'ebands of N.C. Amended Effective: May 1, 2007.
6. Grayed values indicate values that attain or exceed the SWSL Standard.
7. 80141 values indicate values that attain or exceed the 15A NCAC 2B Standard.
B. NE indicates not established. Blank cells indicate thief there I$ no lnformaUon relevant to the respecllve row.
9. Qualifiers in nortitallclxed text are laboratory data qualifiers or'flogs'. "U" Is used to identity results not detected at concentrations which attain the Iaboratorys method detection limit tMDLJ.
-J- Is used to identify estimai concentrations which attain or exceed the MDL but are i than the IatiOratOryk method reporting limit (MRL).
An italicized P-flag is a data qualifier. added by HDR to indicate concentrations which attain or exceed the laboratorys MRL but are less than the SWSL.
10. According to the Constituent Lookup we5page on the NCDENR Division of Waste Management webpage. there Is no SWSL Standard for eneride associated with CAS number 16887-00-6, which is the CAS reported by the taboramry
for the analyses completed Therefore, the SWSL Standard listed Is for the chloride with CAS number SW301 as specified on the Constituent Lookup webpage host updeted June 13. 2011).
11, SU Indicates Standard Units.
12. umhp/= Indicates n1lefornhos per centimeter.
13. BOD indicates biochemical oxygen demand. COD Indicates chemical oxygen demand. Tod Indicates total organic carbon.
14. Analytical results obtained I Electronic Data Deliverable (EDD) provided by Duke Energy on December 10. 2013.
Page 1 of 1

Table 15 . Field and Analytical Results that Equal or Exceed
15A NCAC 2B Surface Water Quality Standards - November 2013
Duke Energy/Mayo Electric Generating Plant
CCP Monoiill, Phase 1- Permit No. 7305
Sample Dates: November 14 and 15, 2013
Field Sampling performed by SynTerra Corporation
Parameter
Sample I❑
Result
t nb
2B Standard
Historical Concentrations
Cause and STgntflcance
Iron
SW-1
3.740
pg/E
1,000
3,740- 16.700
Iron concentration at SW-1 is the lowest concentration measured over the period of monitoring. Turbidity measured at 36 NTUs.
ilronconcentratioriatSW,3isooloweSteoncentratior
SW-3
1.020
pg/L
1.020 - 31,600
measured over the period of monitoring
Notes:
L 15A NCAC 28 Standard is from 'North Carolina Administrative Code. Title 15A Deparment of Environment and Natural Resources. Subchapter 2B-Surface Watef and Wetland Standards: (last amended on May 1. 2007) for pass C waters.
2. Anatocal results obtained from Electronic Data Deliverable (EDD) provided by Duke Energy on December 10, 2013.
3. pglL indicates micrograms per liter,
4. Historical concentrations based on data in Duke Energy analytical results database.
Page 1 of 1

Table 16 • Field Data Parameters - April 2014
Duke Energy/Mayo Electric Generating Plant
CCP Monoflll, Phase 1- Permit No. 7305
WELL
DEPTH TO
WATER
AVERAGE
WELL
EVAC
SPECIFIC
SAMPLE
DEPTH
WATER
ELEV,
PURGE
PUMP RATE
VOLUME
VOLUME
EVAC
TEMP
CONDUCTANCE
pH
TURBIDITY'
ORP'
Do*
DATE _
SAMPLE ID
jreeti
(teat)
(feet)
APPEARANCE
ODOR
METHOD
(mL,/min)
(gallons)
(gallons)
(yes/noi
(degC)
(umho/cm)
(SU)
(NTU)
mV-NHE)
(mg/L)
4/2/2014
MW-1
40.76
17.59
482.59
Clear
None
LF
136
3.70
0.50
No
15
330
6.1
1.7
249
2.700
4/2/2014
MW-2
74.97
40.91
421.24
Clear
None
LF
120
5.56
0.50
No
18
731
7.0
6.7
161
400
4/2/2014
MW-3
53.26
43.21
392,91
Cloudy. gray
None
LF
180
1,54
1.75
No
LG
782
6.7
9.5
147
1,000
4/2/2014
MW-4
38.90
34.74
388.98
Clear with fines
None
LF
130
0.68
1.00
No
17
1,042
6.5
5.9
84
400
4/2/2014
MW-5
51.89
17.85
415.03
Clear
None
LF
110
5.55
0.20
No
16
578
7.2
3.1
193
400
4/2/2014
SW-1
N/A
N/A
N/A
Clear
None
N/A
N/A
N/A
N/A
N/A
12
180
6.8
N/A
265
7.500
4/2/2014
SW-2
N/A
N/A
N/A
Clear
None
N/A
N/A
N/A
N/A
N/A
20
130
7.4
N/A
153
7.100
4/2/2014
SW-3
N/A
N/A
N/A
Clear
None
N/A
N/A
N/A
N/A
N/A
25
122
7.5
N/A
173
6.800
Notes:
L Purge Methods; LF-Low Flow, LFIM1-Low Flow Modified, CP-Conventional Purge (3-5 well volumed. NP-No Purge (+tydraSieevel, EOP-EgUipmOnt 0nty Purge. Average pump rate appliceble to LF and LFfM)purging only.
2. Fleld sampling performed by SynTerra Corporation personnel.
3. EVAC indicates whether Me water level in the well was drawn down to the level of the pump during purging.
4. urho/em indicates micro mhos per centimeter.
5. mL/min indicates miflif4ers per nnnute.
6. SD indicates Standard Units.
7. NTU indicates Nephelometric TurbidL%y Units.
S. mV-NHL indicates mipivalts-Normat Hydrogen Electrode.
9. mg/L indicates milligrams per liter.
10, N/A indicates not applicable.
11.' SynTetra Corporation is not NC-cerbfied for these parameters. Data collected for information purposes only.
12. Information provided by Duke Energy on April 2$, 2014.
Page 1 of 1

Table 18 - Surface Water Field and Analytical Results - April 2014
Duke Energy/Mayo Electric Generating Plant
CCP Monofiil, Phase 1- Permit No. 7305
Sample Date: April 2. 2014 Laboratory Certificate Codes:
SynTerra Corporation Field 95591
Field Sampling performed by SynTerra Corporation Duke Energy Analytical Laboratory #248
Pace Analyst i Services, Inc. #40
Parameter
SWS JD
Units
Certificate
Code
Sample Location
SWSL
15A NCAC 20
T305 SW-1
7305 SW-2 I 7305 SW-2-DUP
7305 SW-3
Field pH
320
SU
5591
6.8
7.4
7,5
NE
6.0-9.0
Specific Conductance
323
umho/cm
5591
180
130
122
NE
NE
Temperature
325
'C
5591
12
20
25
NE
NE
Arsenic
14
µg/L
248
0,193 1
0.141 1
0.134 1
0.529 1
10
10
9adum
15
µg/L
248
59.7 J'
26.6 J,
26.6 J.
25.6 J'
100
200,000
BOD
316
pg1L
40
2 U
2 U
2 U
2 U
NE
NE
Boron
428
pg/L
248
6.63 1
10.2 1
9.67 1
8.79 J
NE
NE
Cadmium
34
µg/L
248
0.101 U
0.101 U
0.101 U
0.101 U
1
2
Chloride
455
µg/L
248
5,050
9.110
9.190
6,700
NE
230.000
Chromium
51
µg/L
248
1.31 1
0.501 1
0.666 J
0.533 1
10
50
COD
317
µg/L
248
13,800 1
7,110 1
1 11.100 1
7.780 1
NE
NE
Copper
54
µg/L
248
1.97 1
1.2 1
117 1
1.4 1
10
7
Fluoride
312
pWL
248
139 J'
102 T
102 1'
97.1 1
2.000
180D
Iron
340
µg/L
248
1.860 1
460 [
461 I
546
300
1,000
Lead
131
µg/L
248
0.434 1
C.143 J
0.141 1
0.143 1
10
25
Manganese
342
µg/L
248
268 1
18A J'
18.3 J'
61.2
50
NE
Mercury
132
µg1L
248
0.006 U
0.006 U
0.006 U
0.006 U
0.2
0.012
Nickel
152
µg/L
248
0.603 1
0.5 u
0.624 1
0.504 1
50
88
Nitrate (as Nitrogenl
303
µg/L
248
8.19 1
5.4 U
5.4 U
21,4 1
10,000
NE
Selenium
182
µglL
248
0.096 1
0.092 u
0.102 J
Ql 1
10
5
Silver
184
pVL
248
0.7 U
0.7 U
0.7 U
O.7 U
10
M06
Sulfate
315
µg/L
248
6.860 1'
12,100 J'
12,100 J'
10.300 J'
250,000
NE
ThaCium
194
µVL
248
0.133 U
0.133 u
0.133 U
0.133 U
5.5
0.47
TOC
357
µg/L
248
3,930
3,360
3.320
2,750
NE
NE
Total Dissolved Solids
311
µg/L
248
141,000
87,OoO
92,000
87,000
NE
NE
Zinc
213
pglt
248
2.6 U
2.6 U
2-6 U
2.6 U
10
50
Notes:
1- Concentrations presented in micrograms Der liter (pgvL).
2, SWS ID is the Solid Waste Section Identification Number,
3. SWSL is the Solid Waste Section LimiL NCDENR detlnes the SWSL as the lowest amount of anstyte In a sample that can be ouantitatirey determined with suitable precision and accuracy.
4. 15A NCAC 2B Standard Is from 'North Carolina Administrative Code, Title 15A: Deparment of Environment and Natural Resources. Subchapter 28 - Surface Water and Wetland Standards.' (last amended on May 1. 2007) for Class C waters.
5. The perennial streams to Hyco River are classified as Class C waters. Regulation 15A NCAC 02D .0211 provides water duality standards for Class C waters.
Reference 15A NCAC 2B .020D Classifications and Water Quality Standards Applicable to Surface Waters and Wetlands of N.C. Amended Effective: May 1, 2007.
6. Grayed values indicate values that attain or exceed the SWSL Standard,
7. Bald values Intilcate values that attain or exceed the 15A NCAC 28 Standard.
8. NE Indicates not established. Blank calls Indicate that there Is no Information relevant to the respective row.
9. Qualifiers in non -italicized text are laboratory data qualifiers or 'flags'. 'U' Is used to Identify resuts not detected at concentrations which attain the Iaberatorys method detection limit tMDL).
'1' Is used to Identify eStimated Cvneentrations which attain or exceed the MDL but are less than the IabOratarys method reporting limit (MRLI.
An itabeized )'.flag is a data qualifier, added by HDR 10 Indicate conceniredons which attain or exceed the IaboratoWs MRL but are less than the SWSL.
10. Acoording to the Constituent Look -up webpage on the NCDENR Division of Waste Management webpage. there is no SWSL Standard for chortle associated with CAS number 16887-00-0. whlch Is the CAS reported by the laboratory
lot the analyses completed. Therefore, the SWSL Standard listed Is for the chloride with CAS number SW301 as specified on the Constituent Look- le webpage ilast updated June 13, 2011),
11. SU Indicates Standard Units,
12. umho/tan indkcates mi romhas per centimeter.
13. BOD Indicates biochemical oxygen demand. COD indicates chemical oxygen demand. TOC Indicates total organic carbon.
14. Analytical results obtalned from Electronic Data Deliverable (EDD) provided by Duke Energy on Apnl 28. 2014.
Page 1 of 1

Table 20 - Field and Analytical Results that Equal or Exceed
15A NCAC 2B Surface Water Quality Standards - April 2014
Duke Energy/Mayo Electric Generating Plant
CCP Monofill, Phase 1- Permit No. 7305
Sample Dates: April 2. 2014
Field Sampling performed by SynTerra Corporation
Parameter Sample ID Result Units 213Standard Historical Concentrations Cause and Significance
Iron SW-1 1.860 ug/L LOGO 1.860-16.700 Iron concentration at SW-1 is the lowest concentration measured over the period of monitoring, Turbidity measured at 10.2 NTUs.
Notes:
L 15A NCAC 213 Standard is from *North Carolina Administrative Code, Title 15A Deparment of Environment and Natural Resources. Subchapter 26-Surface Water and Wetland Standards.' ilast amended on May 1, 2007) for pass C waters.
2. Analytical results obtained from Electronic Data Deliverable (LED) provided by Duke Energy on April 28, 2014.
3. uglL indicates micrograms per 14er.
4. NTU indicates Nephelometric Turbidity Units.
5. Historical concentrations based on data in Duke Energy analyutal results database.
Page I of I

AN
RC
North Carolina Department of Environment and Natural Resources
Pat McCrory John E. %varia, III
Governor Secretary
May 20, 2014
William J. Thacker
Duke Energy Progress, Inc.
Mayo Steam Elect vie Plant
10660 Boston Load
Raxbere, NC 27874
Subject} General hermit No'.'NC6120000
Mayo Swill Plant; Monufill
c@G INIc6120161
Person county
Dear Mr. Thacker:
We received your request to modify the monitoring provistpns in the above permit
Certificate of Coverage (COC) on May 15, 2014. You requested to delay the initial sampling
period of several of the additional parameters by six months to allow time for the monofill to
begin full operation. Your request has been approved, and the modified monitoring schedule
is attached. Please replace the second page of your COC with the enclosed revision.
This permit does not affect the legal.requirements to obtain other permits which may
be required by the Division of Energy, Mineral and Land Resources, or permits required by the
Division of Water Resources, Coastal Area Management Act, or any other federal or local
governmental permit that may be required. If you have any questions concerning this permit
modification, please contact Bradley Bennett at telephone [phone], or Bethany
Georgoulias at telephone [phone].
Sincerely,
for Tracy E. Davis, P.E., CPM
cc: Toby Vinson, Land Quality Section
Dave Parnell, Raleigh Regional Office
Autumn Romanski, DWR Raleigh Regional Office
Sergei Chernikov, DWR Water Quality Permitting Section
Stormwater Permitting Program Files
DWR Central Files
enclosure
Division of Energy, Mineral, and Land Resources
Energy Section - Geological Survey Section - Land Quality Section
1612 Mail Service Center, Raleigh,, North Carolina 27699-1612.919-707-9200 / FAX: [phone]
512 North Sallsbury Street, Raleigh, North Carolina 27604 • Internet: httR:/Iportal.nCdonr.orqlwe4llrI
An Equal opportunity 1 Affirmative Action Employer— 50% Recycled 110% Post Consumer Paper

Table Z Analytical Monitoring Requirements
` >Diseharge r
Characteristics.
-
units � 31
'.1Measurement Freguencyl • .'simple"
„° . _
i T `e"2, '
;Sample: i
L''dcatfi)0
Chemical Oxygen Demand
in l .
semi-annual
Grab
SDO
Fecal Collforrn
# er.100-ml
semi-annual
Grab
SDO
Total Sus ended Solids
ni l
serni'annual
.Grab
SDO'
Arsenic As 5.
mg%1
semi-annual
Grab
SDO
Selenium Se 5
mg/I
Serfii-annual
Grab
SDO
Boron 5
mg/l
semi-aiinual
Grab
SDO
H5
S.U.
semi-annual
Grab
SDO
Coiiductivi
5/In
serni-artnuzl•
..Grab
SDO
Antimony (Sb),Total
Recoverable
171g/i
Once during Jul 1-Dec 31, 2014;
Once during Jan 1.-Jun 30, 2017
Grab
SDO
Barium (Bq), Total
Recoverable
rng/l
Grab
SOO
Beryllium (Be), Total
Recoverable
n7g/I
Grab
STlO
Cadmium (Cd), Total
Recoverable
frig/]
Grab
-SDO
Chromium (Cr), Total
Recoverable
nlg/l
Grab
SDO
Copper (Cu), Total
Recoverable
mg/l
Grab
SDO
Lead (Pb), Total
Recoverable
mg/l
Grab
SDO
Mercury (Hg), Total
Recoverable
mg/l
Grab
.SDO
Molybdenum (Mo), Total
Recoverable
mg/1
Grab
SDO
Nickel (Ni), Total
Recoverable
mg/l
Grab
SDO
Silver (Ag), Total
Recoverable
mg/1
Grab
00
Thalliurn (TI), Total
Recoverable
n]g/I
Grab
5DO
Zinc (Zn), Total
Recoverable
rlig/l
Grab
;SDO.
Total Chloride C1
rn I
Grab
:SDO
Total Fluoride
m ' l
Grab
`SDO
Total Sulfate
rn 1
Grab
:SDO
Total Hardness
m 1
Grab
_ SDO
Total Rainfai14
inches
semi-annual
Rain
au e
-
Footnotes:
1 Measurement Frequency: Twice per year or during the specified period, during a measureable storm event.
2 1 COC No. NCG120101
effective January 6, 2014, modified May 20, 2014

i .!
Parnell, David
To: Georgoulias, Bethany
Cc: Holley, John; Pickle, Ken; Bennett, Bradley
Subject: RE: Mayo Monofill
Bethany,
Thank you for your thorough response. I spoke with John and we agree with your opinion. I will contact
Shannon concerning the request letter.
Dave Parnell
Environmental Senior Specialist
North Carolina Department of Environment & Natural Resources
Division of Energy, Minerals, and Land Resources
Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27609
0: [phone]
F: [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law
and may be disclosed to third parties.
From: Georgoulias, Bethany
Sent, Wednesday, May 07, 2014 1:37 PM
To: Parnell, David
Cc: Holley, John; Pickle, Ken; Bennett, Bradley
Subject: RE: Mayo Monofill
We discussed your questions this morning, Dave. Please see our responses below.
Bethany Georgoulias, Environmental Engineer
NCDENR 1 Division of Energy, Mineral, and Land Resources
Storrnwater Permitting Program
1612 Mail Service Center, Raleigh, NC 27699-1612
512 N. Salisbury Street, Raleigh, NC 27604
919 / 807-6372 (phone); 919 / 807-6494 (fax)
Website: http://portal.ncdenr.orglweb/Ir/stormwater
E-mail correspondence to and from this address may he suhject to the North Carolina Puhlic Records law and may be disclosed do third parties.
From: Parnell, David
Sent: Friday, May 02, 2014 11:18 AM
To: Bennett, Bradley; Georgoulias, Bethany
Cc: Holley, John
Subject: Mayo Monofill
I received a call from Shannon Langley of Duke Energy. He had two issues to discuss:

1. The landfill is under construction. The mal will not be actually be moved to the landfill until June
or later. The required first sample period)m January 6 to June 30, 2014. There may be no, or very
little, material in the landfill by June 30. ksted that Duke request, in writing, an extension of that
first sample period, either by 3 or 6 montlpointed out that it is important to get a valid sample of
the parameters to compare to the last sat to be taken in 2017. Does SPP have a preference on this
time extension?
Dave, we agree with your suggested approach. Pleasrise Duke to submit a request to us to delay the sample period
for the extended set of metals and other parameters:ified for Jan -Jun 2014. The basis of the delay would be to
characterize discharges appropriately at the beginninthe industrial activity, while also allowomg time for the
monofill activities to get underway. We will likely revhat requirement to be the second half of the year (Jul -Dec
2014) instead. We will respond to their request withtter since this is just a minor modification to the monitoring
scheme.
2. Shannon also wanted to meet this summvith me, to talk about ROS. What is the SPP thinking on
the amount of data needed from this faci, before we are to review, and possibly approve his
request? I usually would like 2-5 sample hods of data in order to make a determination.
After discussing, we feel like the most appropriate coe here is to have them sample according to the permit until
NCG12 is up for renewal in 2017, and then ask for ROetermination during the renewal process. Because the COC was
issued in the middle of the NCG12's cycle, the monofvill sample 5-6 times by the time renewal approaches in 2017
(depending on when industrial activity at the monofittually begins. From the context of the first question, it's possible
they will not even have to sample in the first period if material is moved into the monofill before June 30 —another
factor we considered.) We typically contact permitteabout renewal application -6 months prior to expiration, i.e.,
around April 2017 for this permit. Duke also only net to sample for the extended suite of metals and other
parameters (chlorides, fluoride, etc.) twice during thiermit term. The site only has three stormwater outfalls, and so
we feel like this is reasonable. Does the RRO agree?
Thanks,
Dave
Dave Parnell
Environmental Senior Specialist
North Carolina Department of Environment &Natural Resources
Division of Energy, Minerals, and Land Resoues
Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27609
0: [phone]
F: [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law
and may be disclosed to third parties. r
2

DUKE
ENERGY®
PROGRESS
Mr. Bradley Bennett
NC Division of Energy, Mineral and Land Resources
1612 Mail Service Center
Raleigh, NC 27699-1628
Subject: Duke Energy Progress, Inc. (Duke)
Mayo Stearn Electric Generating Plant Monofill
Sampling extension request - NCG 120101
Person County
File: 12520 R
Dear Mr. Bennett:
Mayo Steam Plant
Duke Energy Progress
10660 Boston Road
Roxboro, NC 27574
MAY'l42014
t
j M AY 19 2014
I_.
As discussed during a phone conversation between Mr. Shannon Langley of Duke Energy
(Duke) and Dave Parnell of the Raleigh Regional Office on May 2, 2014, Duke hereby requests
modification of the subject permit to allow for collection of the initial storm water samples
analysis associated with the subject permit.
Duke is making this request because, as of the date of this letter, no coal combustion residuals
have been placed into the monofill. In accordance with the terms of the subject permit, storm
water samples associated with industrial activity are required to be sampled between January 1,
2014 and June 30, 2014 and every six month period thereafter. With no industrial activity to
date, we have been unable to obtain these samples to date. Additionally, prior to operation, Duke
must obtain a certificate to operate the monofill from the North Carolina Division of Waste
Management (NCDWM). Final submittals in order to obtain this certificate are being completed
at this time. Currently, we expect to obtain this certificate in June but that is subject to change
based on the review of NCDWM staff. Modifying the first sampling period to be between July
1, 2014 and December 31, 2014 would ensure a sample associated with industrial activity could
be obtained after the commissioning of the monofill.
As discussed, the Mayo monofill is necessary to facilitate the removal of a wastewater discharge to
Mayo Reservoir in accordance with the Special Order by Consent between Duke Energy Progress
and the North Carolina Environmental Management Commission EMC SOC WQ S10-012. 1f there
are any questions regarding this request, please contact Shannon Langley at [phone].
Cc: Dave Parnell
DEMLR
1628 Mail Service Center
Raleigh, NC 27699-1628
Sincerely,
�"WvU
William J. ac er - Manager
Mayo Electric Generating Plant
www.duke-energy.cnni

• V
W®IMR 3
North Carolina Department of Environment and Natural Resources1t
Division of Energy, Mineral, and Land Resources `
Land Quality Section
Tracy E. Davis, PE, CPM
Director
January 6, 2014
William). '; hacker
Duke Energy Progress, !nc.
Mayo Steam Electric Plant
10660 Boston Road
Roxboro, NC 27574
Pat McCrory, Governor
,iohn E. Skvarla, ill, Secretary
Subject: General Permit No. NCG120000
Mayo Steam Plant Monofill
COC NCG120101
Person County
Dear Mr. Thacker:
In accordance with your application for a discharge permit received on September
23, 2013, we are forwarding herewith the subject certificate of coverage to discharge under
the subject state -- NPDES general permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement between North Carolina and the US Environmental Protection Agency dated
October 15, 2007 (or as subsequently amended).
Please take notice that this certificate of coverage is not transferable except after
notice to the Division of Energy, Mineral, and Land Resources. The Division may require
modification or revocation and reissuance of the certificate of coverage (COC).
Coverage under this General. Permit is granted with the condition that the permittee
performs additional sampling'requirements as outlined in the amended conditions to the
COC. These include:
(1) In addition to the parameters in NCG120000, sample each SDO semi-annually for
conductivity, pH, arsenic (As), selenium (Se), and boron (B). No benchmarks
apply; however, concentrations above the levels in Footnote 5 should be noted on
the Stormwater Outfall Data Monitoring Reports (SDMRs) submitted to NC DENR.
(2) Sample each stormwater outfall (SDO) once during the first 5gmnling event
between January 6 and June 30, 2014 and once in the _-sam ling gvent between
January 1 and June 30, 2017 (Year 5 - Period 1 in the General Permit) for the
expanded list of parameters listed in Table 1 as amended on page 2 of the COC.
1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • Telephone [phone] FAX. [phone]
512 North Salisbury Street, Raleigh, North Carolina 27604 • Internet: htt :II ortal.ncdenr.orglwebArAand-quality
An Equal Opportunity 1 Affirmative Action Employer — 50% Recycled 110% Post Consumer Paper

r.
Mr. Wiliam f. Whacker
January 'I, 2ol
Page 2 of 2
These additional parameters include metals and other constituents which may be
present in Zero Liquid Discharge (ZLD) wastewater used to condition the coal combustion
residue (CCR) transported to the monofill. These sample results will provide a baseline for
stormwater discharges when the monofill has just begun operation and a comparison after
three years of operation. The Division will consider the data upon renewal of coverage
under this General Permit.
The facility may request "Representative OU fall Status" for one or more outfalls at
the nonofll so that fewer outfalls must be sampled. Please see Footnote 3 to Table 1 in the
amended COC. A form for an ROS Request can be found on our website at
http:./.Iportal.ncdenr.org/wg�,b/lr/nl2des-stormwatgl (on the "Miscellaneous Forms" tab).
We request that you provide copies of in -stream monitoring results per the
approved Water Quality Monitoring Plan (WQMP) required by the Solid Waste Permit
for this monofill site to the Raleigh Regional Office. Copies of these results should be sent
to the attention of Dave Parnell in the NC DEMLR Stormwater Permitting Program.
This permit does not affect the legal requirements to obtain other permits which
may be required by the Division of Energy, Mining, and Land Resources, or permits
required by the Division of Water Resources, Coastal Area Management Act, or any other
federal or local governmental permit that may be required. If the conditions as stipulated
in the COC are unacceptable to you, you may apply for an individual NPDES stormwater
permit.
If you have any questions concerning this permit, please contact Bradley Bennett at
telephone number [phone], or Bethany Georgoulias at telephone number (919)
807-6372.
Sincerely,
for Tracy E. Davis, P.B., CPM
cc: Toby Vinson, DEMLR Land Quality Section
Dave Parnell, DEMLR Raleigh Regional Office
Autumn Romanski, DWR Raleigh Regional Office
Sergei Chernikov, DWR Water Quality Permitting Section
Stormwater Permitting Program Files
DWR Central Files

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
GENERAL PERMIT G12 00
CERTIFICATE -OF COYERAGE No. NCG12Q1D1
STORNIuVATER DISCHARGES
ZONAL POLLUTANT T DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1,'other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, and the North
-- Carolina Administrative Code in NCAC 15A 02H .0114(b)(1), as amended,
Duke Energy Progress, Inc.
is hereby authorized to discharge stormwater from a facility located at
Mayo Steam Electric Plant Monofill
10660 Boston Road
Roxboro
Person County
to receiving waters designated as Bowes Branch, a class C water in the Roanoke River -
Basin, in accordance with the. effluent limitations, monitoring requirements, and.other
conditions set forth in Parts I, H, Ill, and IV of General Permit No. NCG120000 as attached,
and as amended'in pages-2-3 of this Certificate of Coverage.
Amended conditions
1. This Certificate of Coverage is an enforceable part of the permit,
2. In accordance with 15A NCAC 02H .0114(b)(1), the monitoring program in Part II
Section B Table 1 Analytical Monitoring Requirements of this permit is amended
as follows:

Table I Analytical Monitoring Requiremeints
N�hient,Frequen
c ­'-
M&as '4
Sam
'p]
Sample-;�
Characteristics,'.',','.'
��­
-
ov��
rN
Location3
.." , .
.-:11 . - AZ;!� 1, A, '0'
Chemical,Oxygen Demand
mg/I
semi-annual
Grab
SDO
Fecal Coliform
# per 100 ml
semi-annual
Grab
S D Q__
Total Suspended Solids
mg/1
semi-annual
SDO
.Arsenic (As
i mg/I
serni-annual
-Grab
Grab
SDO
Selenium (Se)
Mg/l
semi-annual
(:rah
SDO
semi-annual
semi-annual
Grab
SDO
Boron (B)5
mg/I
S.U.
I)H5
SDO
Conductivity
S/m
semi-annual
Grab
SDO
Antimony (Sb), Total
mg/I
Grab
SDO
Recoverable
Barium (0a), Total
mg/1
Grab
SDO
Recoverable
Beryllium (Be), Total
mg/I
Grab
SDO
-Recoverable
Cadmium (Cd), Total
mg/I
Grab
SDO
Recoverable
Chromium (Cr), Total
mg/I
Grab
SDO
Recoverable
Copper (Cu), Total
mg/1
Grab
SDO
Recov6rable
Lead (Pb), Total
mg/1
Grab
SDO
Recoverable
Once during Jan 6-jun 30, 2014;
Mercury (14g), Total -
mg/l
Grab
SDO
Once during Jan 1-Jun 30, 2017
.Recoverable
Molybdenum (Mo), Total
mg/l
Grab
SDO
Recoverable
Nickel (Ni), Total
mg/l
Grab
SDO
Recoverable
Silver (Ag), Total
mg/1
Grab
SDO
-Recoverable
Thallium (TI), Total
mg/l
Grab
SDO
Recoverable
Zinc (Zn), Total
mg/I
Grab
SDO
-Recoverable
Chloride JCI )
mg/I
Grab
SDO
-Total
Total Fluoride (F)
mg/1
Grab
SDO
I
mg/I
Grab
SDO
-Total-Sulfate
Hardness
mg/I
Grab
SDO
-Total
Total Rainfa114
inches
semi-annual
Rain
-
au e
Footnotes.
Measurement Frequency: Twice per year or during the specified period, during a measureable storm
event.
2 l
COC No. NCG120101
effective January 6, 2014

2 Sample collection must begin within the first 30 minutes of discharge and continue to all outfalls until
completed.
3 Sample Location: Samples shall be collected at each stormwater discharge outfall (SDO) unless
representative outfall status (ROS) has been granted by NC Division of Energy, Mineral, and Land
Resources (DEMLR). A copy of the DEMLR letter granting ROS must be kept on site. DEMLR's ROS letter
remains in effect through the subsequent reissuance of this permit and as long as the pertinent site
conditions and operations remain unchanged, unless the ROS letter provides for other conditions or
duration.
4 For each sampled measureable storm event the total precipitation must be recorded from an on -sire rain
gauge. rWhere isolated sites an? unmannedfor extended periods, a local coin gouge readbl q nmy to
substitutedfor an, on -site gauge, upo;) pric;rUEA,L,7 written approvaL1
5 No benchmark applies for these parameters. However, levels above 0.34 mg/1 As, 0.056 mg/I Se, or
outside a pH range of 6.0-9.0 S.0 should be noted on the Stormwater Data Monitoring Report (SDMR)
submitted to NC DENR.
This Certificate of Coverage shall' ecome effective January 6, 2014.
This Certificate of Coverage shall remain in.effect for the duration of the General Permit.
Signed this day, January 6, 2014.
?i
for Tracy E. Davis, P.E., Director
Division of Energy, Mineral, and land Resources
By the Authority of the- Environmental. Management Commission
3 I COC No. NCG120101
effective January 6, 2014

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NCG120101
w E
5
Alap Scale 1. 24, 000
Duke Energy Progress, Inc.
Mayo Steam Electric Plant Monofill
Latitude: 36G 32' 00" N
Longitude: 78055r 21" W
County: Person
Receiving Stream: Baves Branch
Stream Class: C
Sub -basin: 03-02-05 (Roanoke River Basin)
Facility Location

A�
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Energy, Mineral, and Land Resources
Land Quality Section
Tracy E. Davis, PE, CPM
Director
December 20, 2013 - DRAFT
William J. Thacker
Duke Energy Progress, Inc.
Mayo Steam Electric Plant
10660 Boston Road
Roxboro, NC 27574
Pat McCrory, Governor
John E. Skvaha, III, Secretary
Subject: General Permit No. NCG120000
Mayo Steam Plant Monofill
COC NCG120101
Person County
Dear Mr. Thacker:
In accordance with your application for a discharge permit received on September
23, 2013, we are forwarding herewith the subject certificate of coverage to discharge under
the subject state - NPDES general permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement'between North Carolina and the US Environmental Protection Agency dated
October 15, 2007 (or as subsequently amended).
Please take notice that this certificate of coverage is not transferable except after
notice to the Division of Energy, Mineral, and Land Resources. The Division may require
modification or revocation and reissuance of the certificate of coverage [COC).
Coverage under this General Permit is granted with the condition that the permittee
performs additional sampling requirements as outlined in the amended conditions to the
COC. These include:
(1) In addition to the parameters in NCG120000, sample each SDO semi-annually for
conductivity, pH, arsenic (As), selenium (Se), and boron (B). No benchmarks
apply; however, concentrations above the levels in Footnote 5 should be noted on
the Stormwater Outfall Data Monitoring Reports (SDMRs) submitted to NC DENR.
(2) Sample each stormwater outfall (SDO) once during the first sampling event
between January 1 and June 30, 2014 and once in the sampling event between
January 1 and June 30, 2017 (Year 5 - Period 1 in the General Permit) for the
expanded list of parameters listed in Table 1 as amended on page 2 of the COC.
1612 Mail Service Center, Raleigh, North Carolina 27699-1612 - Telephone [phone] I FAX: [phone]
512 North Salisbury Street, Raleigh, North Carolina 27604 • Internet: http:/lportal.ncdenr.00/webArland-quality
An Equal Opportunity 1 Affirmative Action Employer — 50% Recycled 110% Post Consumer Paper

Mr. William J. Thacker
December 20, 2023
Page 2 of 2
These additional parameters include metals and other constituents which may be
present in Zero Liquid Discharge (ZLD) wastewater used to condition the coal combustion
residue (CCR) transported to the monofill. These sample results will provide a baseline for
stormwater discharges when the monofill has just begun operation aad a comparison after
ree years of operation. The Division will consider_th,e data_upon-,renewal=of c-overage
under t `is General P,aermit L
The facility may request "Representative Outfall Status" or one or more outfalls at
the' monofill so that fewer outfalls must- e sampled. Please -see Footnote 3 to Table 1 in the
amended COG A form for an ROS Request can be found on our website at
http://portal.ncdenr.org/web/Ir/npd_ es-Stormwater (on the "Miscellaneous Forms" tab).
We request that you provide copies ot.in;.stream monitoring results perms
approved Date Quality Monitoring Plan'VPIQM i, quired-by f: - So d Waste Permit
for tihis' onm ofiII site t7cFthe Raleigh Regional'Office. Copies of these results should be sent
to the attention of Dave Parnell in the NC.DEMLR Stormwater PermittinR_P_rojzram..-
This permit does not affect the legal requirements to obtain other permits which
may be required by the Division of Energy, Mining, and Land Resources, or permits
required by the Division of Water Resources, Coastal Area Management Act, or any other
federal or local governmental permit that maybe required. If the conditions as stipulated
in the COC are unacceptable to you, you may apply for an individual NPDES stormwater
permit.
If you have any questions concerning this permit, please contact Bethany Georgoulias at
telephone number [phone].
Sincerely,
for Tracy E. Davis, P.E., CPM
cc: DEMLR Raleigh Regional Office / Attn: Dave Parnell
DWR Raleigh Regional Office / Attn: Autumn Romanski
DWR Water Quality Permitting Section / Attn: Sergei Chernikov (Mayo Steam
Electric Station NPDES permit file)
Stormwater Permitting Program Files
DWR Central Files

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Energy, Mineral and Land Resources
Land Quality Section Pat McCrory, Governor
Tracy E. Davis, PE, CPM John E. Skvarla, III, Secretary
Director
December 19, 2013
To: Bethany Georgoulias
Through: John Holley
From: Dave Parnell
Subject: STAFF REPORT
Duke Energy Progress- Mayo Steam Electric Plant Monofill
Permit: NCG 120101 (DRAFT)
Permittee Contact: William J. Thacker
Duke Energy Progress, Inc.
Mayo Steam Electric Plant
10660 Boston Road
Roxboro, North Carolina 27574
Bethany:
I have reviewed the Draft Certificate of Coverage and other pertinent information and offer the following
comments:
1. The draft letter and COC permit were reviewed. As we discussed on the phone, a minor typo of the date
for Analytical Monitoring Requirements should be changed from "once during Jan 1-Jun 30, 2013" to
once during Jan 1- Jun 30, 2014" The letter and COC were easy to read and understand.
2. No Site Visit was conducted for this Report.
3. The DEMLR RRO staff understands the uniqueness of this facility and the justification for the use of the
General permit, as well as the method for analytical monitoring. We will work with the facility during
the upcoming monitoring periods, with this understanding in mind.
4. The DEMLR Regional Staff will review the Sedimentation and Erosion Control plan, when submitted,
assuring that all land disturbance activities are conducted within the requirements of the DEMLR rules.
Erosion Control inspections are conducted on an as needed basis. Typically, a site being developed, is
inspected at least every six months by DEMLR staff.
1628 Mail Service Center, Raleigh, North Carolina 27699-1628
Location: 3800 Barrett Drive, Raleigh, North Carolina 27609 One
Phone: [phone],1 FAX: [phone] NorthCarolina
Internet: http:portal.ncdencorghxebltr! Naturally Equal Opportunity 4 Affirmative Acton Employer

Based on the information provided, the Raleigh Regional Office has no objection to the issuance of the NPDES
Stormwater Permit NCG120101.
Signature Report Preparer L� ► Date f l
Signature of Regional Supe Date
Cc: RRO files
1628 Mail Service Center, Ralegh, North Carolina 27699-1628
Location: 3800 Barrett 0ve, Raleigh, North Carolina 27609 One
Phone: [phone] FAX: [phone] North C arol i n a
Internet: http:portal.ncdenr.orglweblld Naturally
�}� y�r� ll //I ,
An Equal Opportunity 1 Affirmative Action Employer v/ �/ ` `

NCG120101
December 11, 2013
B. Georgoulias
Duke Energy Progress, Inc. — Mayo Steam Electric Plant Monofill for Coal
Combustion Residue (CCR)
Summary
This facility submitted a Notice of Intent (NO[) to be covered under General Permit NCG120000
(Landfills). The stormwater discharge drains to a Bowes Branch (Class C-Sw), in the Roanoke River
Basin. The stream segment is not listed as impaired or subject to a Total Maximum Daily Load (TMDL).
This facility is located in Person County, handled by the Raleigh Regional Office.
History
The Mayo Steam Electric Station (separate from the Monofill site) is permitted under the NPDES
wastewater permit no. NC0038377. In 2009, that permit included stormwater discharges; however,
NPDES stormwater requirements have since been split out and will be permitted separately. A separate
NPDES stormwater permit for the Mayo Steam Electric Plant has never been developed because of
unresolved monitoring issues for coal-fired power plants.
To address a diminishing capacity in Mayo's ash pond and risk of violating effluent limits in that pond
discharge, the company concluded the wet ash handling system had to be eliminated. The plant began
converting toia dry bottom ash handling system (which was 98 percent complete with that by late
September 2013). In addition, a proprietary bioreactor system to remove Hg, Se, and As from the flue
gas desulphurization (FGD) waste stream (directed to the ash pond) was installed, and new proposed
effluent limits were put into the discharge permit. However, the system has not performed as expected,
and the plant has not been able to meet effluent limits. In June 2012, a Special Order by Consent (SOC)
was finalized to address violations of limits in NCO038377 for ash pond outfall 002.
Of the remaining options to comply with the SOC, the company decided to evaporate all the water in a
zero liquid discharge (ZLD) system —basically by using a very large evaporator. The evaporator will
reduce water volumes to 5-10 percent of the initial volume, and what remains will be used to condition
dry ash for transport to the monofill under construction.
General Permit Application Review
a) The permit application has been signed and sufficiently completed. Yes.
b) The SIC code accurately describes this facility's activities and qualifies for coverage under
this general permit. Application noted SIC 4911(Electric Power Generation), but this NOI
is.for stormwater discharges from the monofill for coal combustion residue (CCR) that will
be transferred from Mayo Steam Plant's new Zero Liquid Discharge (ZLD) System.
The NCG12 general permit is applicable to stormwater discharges associated with landfills
permitted by NC Division of Waste Management under NC G.S. 130A-294, and therefore
under consideration for a Certificate of Coverage. Additional monitoring because of the
nature of the material is recommended as a condition of coverage (see special notes).

NCG120101 December 11, 2013
B. Georgoulias
c) Other permits of interest:
#1 DWM Permit No. 7305-INDUS-2012 (Permit to Construct— Phase 1) for Monofill
requires surface water monitoring per the approved Water Quality Monitoring Plan
(WQMP). DWM permit contacts are Larry Frost and Elizabeth Werner. See attached
excerpts from the WQMP and Solid Waste Industrial Landfill Permit.
Obligations require semi-annual monitoring of two upstream points and one downstream
point for numerous metals, BOD, COD, TDS, TOC, pH, conductivity, and temperature.
#2 NPDES Wastewater Permit (NC0038377) for Mayo Steam Plant (separate but nearby
location): the draft permit requires fish tissue sampling for mercury, arsenic, selenium and
thallium up- and downstream. A monitoring plan will be submitted by the company and
approved by NCDENR/DWR. The draft has not been finalized because of on -going litigation.
d) Regional Office input requested: 11/27/2013 (RRO contacts D. Parnell of DEMLR and A.
Romanski of DWR).
RO Approval received: XX/XX/XXXX (see attached e-mail). See also correspondence from A.
Romanski.
e) Will a Post -Construction Permit be required? No, outside of Roxboro in Person County. No
permit unless county has other requirements.
f) Review of data from haul road stormwater discharge data from Mayo Steam Station:
NCO038377 required semi-annual sampling and analysis for several parameters at
stormwater discharge outfall 010 since it became effective on November 1, 2009. However,
only three stormwater DMRs were located in Central Files. Samples were from 9/21/2013;
3/15/2012; and 8/27/2011.
Shannon Langley e-mailed copies of samples from 9/21/2013 (also in CF); 5/6/2013;
2/19/2013; 10/29/2012; 6/11/2012; 3/15/2012 (also in CF); 8/27/2011(also in CF);
5/17/2011; 11/4/2010; and 4/21/2010.
Sample concentrations exceeded benchmarks only once: 5/17/2011 for TSS (152 mg/1), Cu
(9.4 ug/1), and Al (4430 ug/1).
g) Special Notes:
This site will be a fully -lined landfill (approx. 34 acres) for coal combustion residue (CCR)
with potentially very high concentrations in metals. A 1-million gallon capacity leachate
collection system is being installed just west of the landfill and will direct wastewater to the
wastewater treatment system permitted under NC0038377.
Access roads would be handled under the Mayo Steam Station stormwater NPDES permit
[yet undeveloped.] Truck loads are to be covered, and truck wheels will be washed upon
leaving the plant.

NCG120101
h) Stormwater Permitting Recommendations:
December 11, 2013
B. Georgoulias
The NCG12 permit already requires monitoring for Chemical Oxygen Demand (COD), Fecal
Coliform, and Total Suspended Solids (TSS). COD will also be sampled up- and downstream
per the Water Quality Monitoring Plan (WQMP) in the Solid Waste Permit. Several metals
will also be sampled in -stream as part of the WQMP, though not necessarily during storm
events.
I
#1: Recommend sampling all outfalls for following parameters once in the first sampling
period (between Jan 1-Jun 30, 2013), and again in the sampling period before renewal
application (between Jul 1—Oct 31, 2017) of the permit, without any benchmarks:
Antimony (Sb) [prioritymetal]
Lead (Pb)' [prioritymetal]
Arsenic (As)1 [priority metal]
Mercury (Hg)1 [priority metal]
Barium (B)1
Molybdenum (Mo)
Beryllium (Be) [priority metal]
Nickel (Ni)' [priority metal]
Boron (B)1
Selenium (Se)' [prioritymetal]
Cadmium (Cd)1 [prioritymetal]
Silver (Ag)1 [prioritymetal]
Chloride'
Sulfate'
Chromium (Cr)' [priority metal]
Total Hardness (mg/I)
Copper (Cu)1 [prioritymetal]
Thallium (TI)1 fprioritymetal]
Fluoride'-
Zinc (Zn)1 [prioritymetal]
'These parameters will be monitored up- and downstream semi-annually as part of the
approved Solid Waste Permit WQ Monitoring Plan.
RATIONALE: The first sample will yield a baseline for stormwater discharges when the
monofill operation is still new, and the last sample will compare discharges after at least
three years of operation. The list includes the 13 priority pollutant metals (40 CFR §423,
App. A) and other constituents (chloride, sufate, etc.) that may be present in highly
concentrated amounts because of ZLD water used to condition the CCR transported to the
monofill. The amount of dissolved metal is hardness -dependent in many cases and
determines toxicity potential. Results will also help determine whether it is appropriate to
continue coverage under the General Permit at renewal.
This list is based on potential CCR constituents and recommendations by the Raleigh
Regional Office DWR (A. Romanski, 12/2/2013 e-mail attached). Aluminum (Al) and
manganese (Mn) were omitted because water quality standards do not apply to the
receiving waters (Class C) for the monofill, and they are not priority metals. However, Mn is
referenced in the SOC because effluent limits have posed a problem (NOTE: Mayo Reservoir
is classified as a Water Supply water, WS-V, with a corresponding Mn standard).
These metals and other compounds are also associated with air pollution control technology
(APC) waste streams like flue gas desulphurization systems. Molybdenum (Mo) does not
have an NC WQ standard, but there is a stormwater benchmark for Mo based on acute
toxicity data. Along with As, Ba, B, Cd, Cr, Hg, Sb, Se, and TI, the fate of Mo in APC residues

N CG 120101
December 11, 2013
B. Georgoulias
has been studied as part of on -going research by U.S. EPA's National Risk Management
Research Laboratory (Environ. Sci. Technol. 2010, 44, "Evaluating the Fate of Metals in Air
Pollution Control Residues from Coal -Fired Power Plants").
For reference, the following stormwater benchmarks are associated with these parameters:
Parameter
Benchmark
Parameter
Benchmark
Antimony (Sb)
0.09 mg/I
Lead (Pb)
0.075 mg/I
Arsenic (As)
0.34 mg/I
Mercury (Hg)
12 ng/!
Barium (B)
N/A (WS std only, Nat'l
Human Health Criterion)
Molybdenum (MO)
510 mg/1 (no WQ std or
Nat'l criterion, but
some states have a std)
Beryllium (Be)
0.065 mg/l
Nickel (Ni)
0.335 mg/I
Boron (B)
N/A (Narrative Nat'l WQ
criterion, 1986)
Selenium (Se)
0.056 mg/I
Cadmium (Cd)
0.003 mg/I
Silver (Ag)
0.003 mg/I
Chloride
860 mg/I
Sulfate
500 mg/I
Chromium (Cr)
0.9 mg/I
Total Hardness (mg/1)
N/A
Copper (Cu)
0.010 mg/I
Thallium (TI)
N/A (Nat'l Human
Health Criterion)
Fluoride
6 mg/I
Zinc (Zn)
0.126 mg/I
#2: Also recommend supplementing each semi-annual sampling event with analyses for
conductivity, pH, arsenic, selenium, and boron.
RATIONALE: Conductivity is an indicator parameter of inorganic contaminants, and regular
monitoring through the permit cycle will establish values characteristic of the stormwater
from this site. The pH is also an indicator parameter and important for interpreting toxicity
of total recoverable metal concentrations. Both are also rapid and simple parameters to
measure in the field, and offer an opportunity for prompt attention if an issue arises. Both
arsenic and selenium are constituents in CCR, and Se wastewater limit violations are
addressed by the SOC (per discussion with A. Romanski, RRO on 9/18/2013). There are NC
Water Quality standards for both metals. Boron is a tracer for the presence of coal; regular
monitoring will establish a characteristic level in the discharge and help the company
identify excursions above normal ambient levels. Combining measurement of these three
elements with conductivity measurements may also establish trend relationships for a more
simple monitoring approach in the future.
Stormwater concentrations over the following benchmarks should be noted on DMRs but
not trigger Tier Responses:
Parameter
Benchmark
Conductivity
N/A
Boron (B)
N/A
pH
Between 6.0 - 9.0
Arsenic (As)
0.34 mg/I
Selenium (Se)
0.056 mg/I

NCG120101
December 11, 2013
B. Georgoulias
Based on a review of the haul road stormwater data from the Mayo Steam plant, we do not
anticipate these benchmarks to pose a problem unless there is a contamination issue in
need of attention. Data for these additional parameters should be submitted to Central
Office with the DMRs for this permit.
Phone and Meeting logs
9/11/2013: Meeting with Toya Ogallo, Shannon Langley, and Steve Cahoon of Duke energy Progress to
discuss project prior to N01 submittal.
Questions
There were only three SDMRs in Central Files; has there been semi-annual stormwater sampling of SDO
010 at Mayo Steam Plant? Yes. Shannon Langley e-mailed copies of the reports on 1111512013.
Where will fish tissue sampling for Mayo Steam Plant take place? Mayo Reservoir? Most likely.
Monitoring plan that requires fish tissue monitoring "near the Ash Pond discharge" will be submitted to
DWR for approval after wastewater permit finalized, and locations will be defined in the plan. Proposed
NPDES WW permit language suggests As, Se, TI, and Hg will be tested.

1
Parnell, David V(& S G , ('D 51
From: Georgoulias, Bethany �.
Sent: Thursday, December 12, 2013 9:50 AM /�'�L-�W �L .
To: Parnell, David; Bennett, Bradley U ��.Z..�p
Cc: rRomanski,_Autumn;.Holley, John; Pickle, Ken; Smith, Danny
Subject: �aMayo Steam Plant CCR-Monofill - NCG12 COC Issuance with Amended Conditions
Attachments: �NCG120101. COC:docx;-NCG120101_coverletter.docx; NCG120101—Review.docx
Importance: CD
Dave,
I hope you had a nice vacation over the Thanksgiving holiday. I'm sure you are still catching up!
Attached are documents I've drafted in preparation to issue a Certificate of Coverage for NCG12 for the Mayo Steam
Plant Monofill under construction in Person County. It's scheduled to begin operation early next year, and we'd like to
issue it before the Christmas holidays.
This is an unusual COC because it has several amended conditions based on the material (coal combustion reside
sprayed with evaporator liquid waste from the ZLD system going in at Mayo Steam Plan). We have proposed additional
monitoring through the permit cycle, as well as two special events with a more comprehensive e-1ist�Piease•see-th
aTtacRV0R'ArfCOC. TITifs COC will'be finalized before being sen `to tthe permittee —we don't run public notices or
normally provide permittees with "draft" COC's. I just wanted you to review it.
have some information about the Solid Waste Permit, but I assume there is also an E&SC plan in place for this site?
Dave, if it would help to talk with you and John about any questions you have, please let us know. Bradley and I can
be available to discuss. We want to make sure RRO DEMLR understands how different this site is than our usual general
permits. Does the RRO [DEMLR or DWR] have any`objectibn to proceeding'with-issuance of"this COC? Prea�sel t us
nc�"ow our concurrence by December 18`n
Autumn and Danny are very familiar with the Mayo Steam Plant and the variety of issues there. She has provided a lot
of information I've incorporated into my review (and by the way, please disregard the first one I sent, because I had to
correct some history in there with the help of her summary below.) THANK YOU FOR ALL YOUR HELP WITH THIS ONE,
AUTUMNH
Autumn and Danny, please let us know your concurrence with this proposed path forward on the COC as well.
Instead of putting the extra monitoring in just the cover letter, we have amended it to the actual COC and noted the
COC is an enforceable part of the permit. We are also requesting in -stream sampling results from the WQMP under the
solid waste permit be copied to RRO (see draft cover letter).
We plan to brief Tracy and Toby in DEMLR about this permit, since there's been litigation surrounding the Mayo Steam
Plant NPDES wastewater permit and so many issues with the coal fired power plants in general. Our AG's office has said
we are okay to move ahead with this one since it is a separate site.
We also know there are several landfills out there (many unlined, unlike this one —which we expect to be much lower
risk) that are accepting coal ash. Autumn has given me info. on the Halifax County Landfill after her investigations there,.
and certainly there are many others. I think this will be an important aspect to consider in our NCG12 renewal, and we'll
probably incorporate additional monitoring for outfalls that receive any runoff from areas where ash was/is being
landfilled.

Thanks so much for your prompt attention to this one,
Bethany
Bethany Georgoulias, Environmental Engineer
NCDENR / Division of Energy, Mineral, and Land Resources
Storrnwater Permitting, Program
1612 Mail Service Center, Raleigh, NC 27699-1612
512 N. Salisbury Street, Raleigh, NC 27604
919 / 807-6372 (phone); 919 / 807-6494 (fax)
Website: http://portal.ncdenr.o[g/web/Ir/stormwater
E-mail correspondence to and from this address may be subject to the North Carolina Public Records law and may be disclosed to third parties.
From: Romanski, Autumn
Sent: Tuesday, December 10, 2013 2:26 PM
To: Georgoulias, Bethany
Subject: RE: Mayo Steam Plant CCR Monofill - 2009 file review question
Bethany,
This is the only signed SOC for Mayo and it took 1 %: years to reach a final agreement. Application dated Dec 9, 2010
with final signed June 2012. Any other SOC documents (which originate from the RRO Office and then are finalized by
the CO and Director) dated earlier than June 2012 would have been drafts from 2010 to final in 2012. The modified
permit currently in effect was effective November 1, 2009 and expired March 31, 2012. No reissuance, e-mail trail of
permit renewal being passed from permit writer to permit writer and according to Sergei- who did the final draft in
2012-2013, the permit cannot be reissued yet due the law suit?
I think Roxboro SOC draft (an application for SOC was received March 30, 2009, a second SOC draft was submitted to CO
on !November 9, 2009, then another draft sent to CO on February 2, 2010, none ever signed.) Eventually, the SOC was
no longer needed by August/Sept 2010 since by then the treatment units were repaired. Additional sampling was
required by RRO during the wastewater treatment units failures, starting in March 2008. The additional monitoring
required by RRO stopped in Sept 2010 when the treatment units repairs were completed.. There is currently no SOC at
Roxboro and last permit issued was modification dated 2009 and expiration date March 31, 2012.
I hope providing this timeline of events associated with 2009 and Sac applications clears up any ambiguity from the CO
file review. If not, just give a call.
Autumn

r
Parnell, David
From: Georgoulias, Bethany
Sent: Wednesday, November 27, 2013 11:45 AM
To: Bennett, Bradley; Pickle, Ken
Cc: Parnell, David; Romanski, Autumn
Subject: EIlllayo Steam Plant.CCR.NloriofiI[
Attachments: NCG120101—NOl.pdf; NCG120101_C0C.docx; NCG120101_coverletter.docx; NCG120101
Review.docx
Bradley and Ken:
Let's schedule some time to talk about what I'm proposing as "conditional coverage" under General Permit NCG12 for
the Mayo Monofill early next week. I have attached a draft COC and -draft cover letter. I'm also attaching my review
summary. I have included some information about rationale in the draft cover letter to the permittee as well, but
maybe we should omit that and simply retain that in my review document. Any thoughts on the text would be helpful.
Bradley, given the site and issues surrounding these facilities, I plan to have you sign the COC and letter when it's
issued.
DG a—vead,Autumn:
Attached is a copy of the NOl from Duke Progress Inc. for this new CCR Monofill. I've already talked with Autumn about
it a couple of times since she's familiar with the site and the Wastewater Permit/SOC for this site. We are proposing to
move ahead with a general permit instead of an individual permit, but with additional monitoring requirements.
The details and rationale for my proposed monitoring are outlined in my review summary. This serves as our request to
the Raleigh Regional Office for concurrence to move forward with a COC to cover this site under NCG120000, with the
additional conditions. The monofill is scheduled to begin operation very soon —if not already —as a result of
stipulations in the`SQC. We appreciate your feedback and response about whether to move ahead as soon as you are
able to give it attention.
Thanks!
Bethany
Bethany Georgoulias, Environmental Engineer
NCDENR / Division of Energy, Mineral, and Land Resources
Stormwater Permitting Program
1612 Mail Service Center, Raleigh, NC 27699-1612
512 N. Salisbury Street, Raleigh, NC 27604
919 / 807-6372 (phone); 919 / 807-6494 (fax)
Website: http://portal.ncdenr.orglweb/lr/stormwater
F-mall correspondence to and from this address may be .suhjecl to the North Carolina Public Records laiv and may be disclosed to Third parties.

r
NCG 120101
November 27, 2013
B. Georgoukias
Duke Energy Progress, Inc. — Mayo Steam Electric Plant Monofill for Coal
Combustion Residue (CCR) e
Summary
This facility submitted a Notice of Intent (N01) to be covered under General Permit NCG120000
(Landfills . The stormwater discharge drains to a Bowes Branch (Class C-Sw), in the Roanoke River
(Landfills
The stream segment is not listed as impaired or subject to a Total Maximum Daily Load (TMDL).
This facility is located.in Person County, handled by the Raleigh Regional Office.
History
The Mayo Steam Electric Station (separate from the Monofill site) is permitted under the NPDES
wastewater permit no. NC0038377. In 2009, that permit included stormwater discharges; however,
NPDES stormwater requirements have since been split out and will be permitted separately. A separate
stormwater permit for the Mayo Steam Electric Plant has never been developed because of unresolved
stormwater monitoring issues for coal-fired power plants.
In 2009,ythe company negotiated a Special Order by ConsenQSOC),as a result of limits violations in the
NPDES wastewater permit. To address a diminishing capacity in their ash pond and risk of violating
effluent'limits in that pond discharge, the company concluded the wet ash handling }system �had dttoobbe
eliminated. The plant began converting to a dry bottom ash handling system (which was 98 percent
omppleette�with that by late September 2013 'In addition, a proprietary bioreactor system to remove Hg,
Se, and As from the flue gas desulphurization (FGD) wastestream was installed, and new proposed
effluent limits were put into the discharge permit. However, the system has not performed as�expected
on all parameters, and the plant still cannot -meet effluent limits.,
Of the remaining options to comply with theSOC, the company decided to evaporate all the water in a
zero liquid discharge (ZLD) stem. The evaporator will reduce water volumes to 5-10 percent oftl e
initialvolume, and that stream will be used to condition dry_as h for transport.to the monofill under
construction.
General Permit Application Review
a) The permit application has been signed and sufficiently completed. Yes.
b) The SIC code accurately describes this facility's activities and qualifies for coverage under
this general permit. Application noted SIC 4911(Electric Power Generation), but this NOI
is for stormwater discharges from the monofill for coal combustion residue (CCR) that will
be transferred from Mayo Steam'Plant's new Zero L'iquicf-Dischargp-(ZED) System,
The NCG12 general permit is applicable to stormwater disc
permitted by NC Division of. Waste Management under NC G.S. 130A-294, and therefore
Under-considfer'ation far a Certificate of Coverage. Additional metals monitoring becausE
speciai no

t
N CG 120101
November 27, 2013
B. Georgoulias
c) Other permits of interest:
#� DWMP�ermit No. 7305-INDUS-2012 (Permit to Construct — Phase 1) for Monofill
requires surface water monitoring per the approved Water Quality Monitoring Plan
(WQMP). DWM permit contacts are Larry Frost and Elizabeth Werner. See attached
excerpts from the WQMP and Solid Waste Industrial Landfill Permit.
Obligations require semi-annual monitoring of two upstream points and one downstream
point for numerous metals, BOD—COD; 7D5, TCC,.pH, conductivity, and temperature.
#2 NPDES Wastewater Permit(NC0038377),fdr Mayo Steam Plant (separate location): the
draft permit'requrres'fisFi t ism esamplrng for mercury, arsenic, selenium and thalli downstream. A monitoring plan will be subm� itted"by the company and approved by
NCDENR/DWR.
d) Regional Office input requested: 11/27/2013 (RRO contacts D. Parnell of DEMLR and A.
Romanski of DWR).°"��"°
RO Approval received: XX/XX/XXXX (see attached e-mail)
e) - Will a Post -Construction Permit be required? Is Roxboro implementing yet?
f) Review of data from haul road stormwater discharge data from Mayo Steam Station:
NCO038377 required semi-annual sampling and analysis for several parameters at
stormwater discharge outfall 010 since it became effective on November 1, 2009. However,
only three stormwater DMRs�located in Central Files. Samples were from 9/21�/2�013;-
3/15/2012;'and 8/27/2011.
Shannon Langley e-mailed copies of samples from 9/21/2013 (also in CF); 5/6/2013;
2/19/2013; 10/29/2012; 6/11/2012; 3/15/2012 (also in CF); 8/27/2011(also in CF);
5/17/2011; 11/4/2010; and 4/21/2010.
Sample concentrations exceeded benchmarks only once: 5/17/2011 for TSS (k52 mg/I), Cu
(9.4 ug/1), and Al (4430 ug/1).
d
g) Special Notes:
This site will be a fully -lined landfill (approx. 34 acres) for coal combustion residue with
potentially very high concentrations in metals. A 1-million gallon capacity lepachatem collection system is being instaIled_just of the landfill and will direct wastewater to the
wastewater treatment system permitted under MCO� 038.679.
Access roads would be handled under the Mayo Steam Station stormwater NPDES permit
[yet undeveloped.) Truck loads are to be covered, and truck wheels will be washed upon
,,leaving the plant. „

NCG120101
h) Stormwater Permitting Recommendations:
November 27, 2013
S. Georgoubas
The NCG12 permit already requires monitoring for Chemical Oxygen Demand (COD), Fecal
Coliform, and Total Suspended Solids (TSS). COb will also_be_sampled up.and downstream
ertlie'Wter Qu`a[ity IVlonitoririg Plan-(1NQ P)-in the Solid Waste Perm Several metals
will also be sampled in -stream as part of't e ' QMP, though not necessarily during storm
events.
Recommend sampling all stormwater outfalls for following metals once during the second
sampling period (between 6 -12 months after the COC effective date withoutt oob_y_�
Antimony (Sb)
Lead (Pb)
Arsenic (As)
Mercury (Hg)
Beryllium (Be)
Nickel (Ni)
Boron (B)
Selenium (Se)
Cadmium (Cd)
Silver (Ag)
Chromium (Cr)
Thallium (TI)
Copper (Cu)
Zinc (Zn)
RATIONALE: These data will yield baselin , or stormwater discharges after the monofill
has begun operation. This list includes metals which may be present in highly concentrated
amounts because of ZLD water used to condition the CCR transported to the monofill.
Also recommend supplementing each semi-annual sampling event with analyses for
conductivity,_ PH, arsenic, selenium, and boron. RATIONALE: Conductivity�an indicator
parameter of inorganic contaminants, and regular monitoring throu�g tTe permit cycle will
establish values characteristic of the stormwater from this site. The pH is also an indicator
parameter and important for interpreting toxicity of total recov bra ie_ Atal concentrations.
Both are also rapid and simple parameters to measure in the field, and offer an opportunity
for prompt attention if an issue arises. Arsenic and selenium wastewater limit
exceedances are addressed by the SOC ( etrdiscussl"bh- it A. Romanski, RRO on
g'j!1'8%20 —V, and both metals are constituents in CR. Boron is a tracer for the presence of
coal; regular monitoring will establish a charactens"f' is le e_1 imtlie-discharge and help the
company identify excursions above normal ambient levels. Companion results of these
three elements with conductivity measurements may also establish trend relationships for a
more simplistic monitoring approach in the future.
Stormwater concentrations over the following benchmarks should be noted on DMRs but
not trigger Tier Responses:
Parameter
Benchmark
Conductivity
N/A
Boron (B)
N/A
pH
Between 6.0 - 9.0
Arsenic (As)
0.34 mg/I
Selenium (Se)
0.056 mg/I

NCG120101 November 27, 2013
B. Georgoulias
Based on a review of the haul road stormwater data from the Mayo Steam plant, we do not
anticipate these benchmarks to pose a problem unless there is a stormwater contamination
issue in need of attention. Monitoring conductivity and boron will allow the company to
characterize normal stormwater discharges and identify triggers for unusual excursions.
Data should be submitted to Central Office with the DMRs for this permit.
Phone and Meeting logs
9/11/2013: Meeting with Toya Ogallo, Shannon Langley, and Steve Cahoon of Duke energy Progress to
discuss project prior to NO1 submittal.
Questions
There were only three SDMRs in Central Files; has there been semi-annual stormwater sampling of SDO
010 at Mayo Steam Plant? Yes. Shannon Langley e-mailed copies of the reports on 1111512013.
Where will fish tissue sampling for Mayo Steam Plant take place? Mayo Reservoir? Most likely.
Monitoring plan that requires fish tissue monitoring "near the Ash Pond discharge" will be submitted to
DWR far approval after wastewater permit finalized, and locations will be defined in the plan.

DUKE
ENERGY.
PROGRESS
Mr. Ken Pickle
NC Division of Energy, Mineral and Land Resources
1612 Mail Service Center
Raleigh, NC 27699-1612
File: 12520 B-1
12520 R
12566 D
Mayo Steam Plant
Duke Energy Progress
10660 Boston Road
Roxboro, NC 27574
� � 1 9 2013'
4okt jo , z�73.
Subjects: Duke Energy Progress, Inc.
Mayo Electric Generating Plant CCP Monofill
Submittal of Notice of hitent for coverage under NCGI20000
File:
Dear Mr. Pickle:
As discussed during a meeting held on Wednesday September 11, 2013 between you and representatives
of Duke Energy, please find enclosed a completed Notice of Intent (N01) for coverage of the Mayo Coal
Combustion Products (CCP) residual monofill.
The NCG 120000 general permit states that coverage is provided to "All owners or operators of storm
water pointsource discharges associated with activities categorized as landfills, including
construction and demolition debris landfills, which are permitted by the North Carolina Division of
Waste Management under the provisions and requirements of North Carolina General Statute 130A-
294." The Mayo Monofill received permit number 7305-INDUS-2012 from the North Carolina
Division of Waste Management (DWM) in accordance with North Carolina General Statute 130A-
294. The DWM permit requires Duke Energy to perform twice -yearly surface water monitoring for
an extensive list of constituents.
As discussed, the Mayo monofll is necessary to facilitate the removal of a wastewater discharge to
Mayo Reservoir in accordance with the Special Order by Consent between Duke Energy progress
and the North Carolina Environmental Management Commission EMC SOC WQ S10-012. If there are
any questions regarding the enclosed information, please contact Shannon Langley at [phone].
I certify, under penalty of law, that this document and all allachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the syslent, or those persons directly responsible for gathering the
infornralian, the information submitted is, to the best of my Intowledge and belief, true, accurate,
and complele. I am aware that there are significant penalties for submitting false it forrrration,
including the possibility offines and imprisonment for knowing violations.
Enclosure
Sincerely,
a'�4%0 ) (W4A-,Il
William J. Thacker - Manager
Mayo Electric Generating Plant
www.duke•energy.com

"ern 9 ?�Ji,a
Mr. Ken Pickle,
NC Division of Energy, Mineral and Land Resources
1612 Mail Service Center
Raleigh, NC 27699-1612
File: 12520 S-I
12520 R
12566 D
Subjects: Duke Energy Progress, Inc.
Mayo Electric Generating Plant CCP Monofill
Submittal of Notice of Intent for coverage under NCG120000
Cc: Danny Smith wl enclosure
Raleigh Regional Office Supervisor
1628 Mail Service Center
Raleigh, NC 27699-1628

Division of Water Quality / Surface Water Protection
�, Section
National Pollutant Discharge Elimination System
NCDENR
`"'"p .' — `" gl NCG 120000
las"Nael, �-
National Pollutant Discharge Elimination System application for coverage under General Permit
NCG120000:
STORMWATER DISCHARGES associated with activities classified as:
Landfills that are permitted by the North Carolina Division of Waste Management under the
provisions and requirements of North Carolina General Statute 130A — 294.
The following activities are specifically excluded from coverage under this General Permit:
Stormwater discharges from open dumps, hazardous waste disposal sites, or discharge of waste (including
leachate) to the waters of the state.
LjI For questions, please contact the AWO Regional Office for your area. See page 4.
(Please print or type)
1) Mailing address of ownerloperator taddren to which allyermil cgrrespondence will be mailed):
Name ' Mayo Steam Electric-PlanLl2uke Eagray Progress. Inc
Street Address 10660 Boston R9�d
City Roxboro State N.Q ZIP Code 27574
Telephone No. 919-546-243 (corporate contact) Fax: [phone]
2) Location of facility producing discharge:
Facility Name Mayo Steam Plant Monofill
Facility Contact Dulcie Phillips
Street Address 10660 Boston Road
City Roxboro State NC ZIP Code 27574
County Permon
Telephone No. 336-597-7331 Fax: [phone]
Email Dulcie.PhilliAs()duke-en=v.cop3
3) Physical Location Information:
Please provide a narrative description of how to get to the facility (use street names, state road numbers, and
distance and direction from a roadway intersection). US501N. Leftont-q R.T. Hester Road
(A copy of a county map or USGS quad sheet wRh facility dearly located must be submitted with this application.)
4) Latitude 36°31'59.93'N Longitude 78°55'20.75W. (deg, min, sec)
6) This NPDES Permit Application applies to which of the following:
X Newor Proposed Facility Date operation is to begin estimated Noyember_2015
© Existing
Page 1 of 4
SWU-227-071408 last revised 7114/08

NCG120000 NAL
6) Standard industrial Classification:
Provide the 4-digit Standard Industrial Classification Code (SIC Code) that describes the primary industrial
activity at this facility.
SIC. Code: ,4_ _9_ _1_1�
7) Provide a brief narrative description of the types of Industrial activities and products manufactured at
this facility: Th site currently is under construction to become a NCDENR permitted tted industrial materials
iandfi[[L_ Once the facility receives a permit to operate. Coal Combustion Residue _(CC_R] will be_transferred
from the nearby Duke Energy Progreso, Mayo Steam Plant and placed in the newly constructed facility..
tgavy eguiamentwill be _present on -site to gpnduci -daily -landfill rglated activities, As_a condition of_ the
NCG120000 permit the landfill will maintain an approved sediment and erosion conttgl plan and fulfill the
Additionally.. the permit issued by the NC Division of Solid Waste requites sampling of surrounding surface
urface_
waters for a number of.constituentl.
8) Discharge points ! Receiving waters:
How many discharge points (ditches, pipes, channels, etc.) convey stormwater from the property? 3
What is the name of the body or bodies of water (creek, stream, river, lake, etc.) that the facility stormwater
discharges end up in? Howes Branch_
Receiving water classification; -4 'TZ-- 5 & —1 q 1 jZ aa.� lL , c. (+ • �p a5,� o 3 - a ? O T-
.C.
Is this a 303(d) listed stream? No Has a TMDL been approved for this watershed? No
If the site stormwater discharges to a separate storm sewer system, name the operator of the separate storm
sewer system (e.g. City of Raleigh municipal storm sewer). N/A
8) Does this facility have any other NPDES permits?
X No
❑ Yes
If yes, list the permit numbers for all current NPDES permits for this facility:
10) Does this facility have any Non -Discharge permits (ex: recycle permit)?
X No
❑ Yes
If yes, list the permit numbers for all current Non -Discharge permits for this facility: _
11) Does thls facility employ any best management practices for stormwater control?
❑ No
X Yes (Show structural BMPs on the site diagram.)
If yes, please briefly describe: The facility is currently ggriductingo s ru ion relaled activitie§ i
accordance to the, approved sediment andeLoion control plan anemias constructed/implemented the
IIQrmwater control features shown on the attached Site Diagram..
12) Does this facility have a Stomiwater Pollution Prevention Plan?
X No `
0 Yes
If yes, when was it implemented?
13) Are vehicle maintenance activities occurring at this facility?
Page 2 of 4
SWU-227-071408 Last revised 7114/08

NCG120000 N.O.I.
No XYes
14) Hazardous Waste:
a) Is this facility a Hazardous Waste Treatment, Storage, or Disposal Facility?
X No ❑ Yes
b) Is this facility a Small Quantity Generator (less than 1000 kg. of hazardous waste generated per month) of
hazardous waste?
X No ❑ Yes
c) Is this facility a Large Quantity Generator (1000 kg. or more of hazardous waste generated per month) of
hazardous waste?
X No ❑ Yes
d) Is hazardous waste stored in the 100-year flood plain?
X No ❑ Yes If yes, include information to demonstrate protection from flooding.
e) If you answered yes to questions b. or c., please provide the following information:
Type(s) of waste:
How is material stored:
Where is material stored:
How many disposal shipments per year.
Name of transport i disposal vendor:
Vendor address:
15) Certification:
North Carolina General Statute 143-215.88(i) provides that.
Any person who knowingly makes any false statement, representation, or certification in any application, record, report,
plan, or other document filed or required to be maintained under this Article or a rule implementing this Article; or who
knowingly makes a false statement of a material fact in a ruiemaking proceeding or contested case under this Article; or
who falsifies, tampers with, or knowingly renders Inaccurate any recording or monitoring device or method required to be
operated of maintained under this Article or rules of the Commission implementing this Article shall be guilty of a Class 2
misdemeanor which may include a fine not to exceed ten thousand dollars ($10.000). .
I hereby request coverage under the referenced General Permit. I understand that coverage under this
permit will constitute the permit requirements for the discharge(s) and is enforceable in the same manner as
an individual permit.
I certify that I am familiar with the information contained in this application and that to the best of my
knowledge and belief such information is true, complete, and accurate.
Printed Name of Person Signing: William J. Thacker
Title:.Plant-Manager
(Signature of Applicant) (Date Signed)
Notice of Intent must be accompanied by a check or money order for $100.00 made payable to:
Page 3 of 4
SWU-227-071406 Last revised 7/14108

NCG120000 N.O.l.
NCDENR
Final Checklist
This application will be returned as Incomplete unless all of the following Items have been Included:
❑ Check for $100 made payable to NCDENR
❑ This completed application and all supporting documents
❑ A site diagram showing, at a minimum, (existing or proposed):
(a) outline of drainage areas, (b) stormwater management structures, (c) location of stormwater outfalls
corresponding to the drainage areas, (d) runoff conveyance features, (e) areas where materials are stored,
(f) impervious areas, (g) site property lines.
C3 Copy of county map or USGS quad sheet with location of facility clearly marked on map
Mail the entire package to:
Stormwater Permitting Unit
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Note
The submission of this document does not guarantee coverage under the NPDE5 General Permit.
For questions, please contact the DWQ Regional Office for your area.
Asheville Office ...... [phone]
Fayetteville Office
... [phone]
Mooresville Office
... [phone]
Raleigh Office ........
[phone]
Washington Office...
[phone]
Wilmington Office
... [phone]
Winston-Salem ...... [phone]
Central Office .........
[phone]
Page 4 of 4
SWU-227-071408 Last revised 7114108

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Check Number
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Vendor name
N C DENR
Vendor #
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invoice Number
invoice Date
Adjustments
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including Progress Energy, Inc. and Its subsidiaries DUKE VOID hFTE:R !i ,
P.O. Box 1561 4 ENERGY.
Check Date r- i k
Pmeigh,NC27W2 09-SEP-13 327721 *+�*"*+100.00
Pay Exactly One Hundred Dollars And 00 Cents**•*+*+++++++**+*+**+****+****++**
TO THE N C DENR
ORDER STORMWATER PERMITTING PROGRAM
OF 1612 MAIL SVC CTR
RALEIGH, NC 27699
WELLS FARGO BANK, N.A.
Augusta, GA
Signature

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
GENERAL PERMIT NO. NCG120000
CERTIFICATE OF COVERAGE No. NCG120101
STORMWATER AND MINE DEWATERING DISCHARGES
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, 'and the North
Carolina Administrative Code in NCAC 15A 02H .0114(b)(1), as amended,
DRAFT
Duke Energy Progress, Inc.
is hereby authorized to discharge stormwater from a facility located at
Mayo Steam Electric Plant Monofill
10660 Boston Road
Roxboro
Person County
to receiving waters designated as Bowes Branch, a class C water in the Roanoke River
Basin, in accordance with the effluent limitations, monitoring requirements, and other
conditions set forth in Parts 1, Il, II1, and 1V of General Permit No. NCG120000 as attached,
and as amended in pages 2-3 of this Certificate of Coverage.
Amended canditLons
I. This Certificate of Coverage is an enforceable part of the permit:
2. In accordance with 15A NCAC 021-1.0114(b)(1), the monitoring program in Part II
Section B Table 1 Analytical Monitoring Requirements of this permit is amended
as follows: -- - - - - - - - --

Table 1 Analytical Monitoring Requirements
Discharge
Measurement Frequencyl
Sample
Sample
Characteristics
Units
Type2
Location3
Chemical Oxygen Demand
m I
semi-annual
Grab
SDO
Fecal Coliform
# per 100 ml
semi-annual
Grab
SDO
Total Suspended Solids
m I
semi-annual
Grab
SDO
Arsenic (As)5
mg/I
semi-annual
Grab
SDO
Selenium (Se)5
mg/1
semi-annual
Grab
SDO
Boron B 5
mg/1
semi-annual
Grab
SDO
H5
S.U.
semi-annual
Grab
SDO
Conductivity
S m
semi-annual
Grab
SDO
Antimony (Sb), Total
mg/1
Grab
SDO
Recoverable
Barium (Ba), Total
mg/l
Grab
SDO
Recoverable
Berylium (Be), Total
mg/I
Grab
SDO
Recoverable
Cadmium (Cd), Total
mg/l
Grab
SDO
Recoverable
Chromium (Cr), Total
mg/l
Grab
SDO
Recoverable
Copper (Cu), Total
mg/1
Grab
SDO
Recoverable
Lead (Pb), Total
mg/l
Grab
SDO
Recoverable
Once during Jan 1-Jun 30, 201 ,
Mercury (Hg), Total
mg/1
Grab
SDO
Recoverable
Once during Jan 1-Jun 30, 2017
Molybdenum (Mo), Total
mg/I
Grab
SDO
Recoverable
Nickel (Ni), Total
mg/1
Grab
SDO
Recoverable
Silver (Ag), Total
mg/1
Grab
SDO
Recoverable
Thallium (TI), Total
mg/1
Grab
SDO
Recoverable
Zinc (Zn), Total
mg/I
Grab
SDO
Recoverable
I
Total Chloride C1
m I
Grab
SDO
Total Fluoride F
mg/1
Grab
SDO
Total Sulfate
mg/1
Grab
SDO
Total Hardness
mg/1
Grab
SDO
Total Rainfa114
inches
semi-annual
Rain
-
gauge
Foptnotes:
1 Measurement Frequency: Twice per year or during the specified period, during a measureable storm
event.
2 I COC No. NCG120101
effective December 30, 2013

LOCATION MAP:
NCG1201O1
Map Scale 1: 24, 000
Duke Energy Progress, Inc.
Mayo Steam Electric Plant Monofill
Latitude: 360 32' 00" N
Longitude: 780 55` 21" W
County: Person
Receiving Stream: Bwn es Branch
Stream Class: C
Sub -basin: 03-02-05 (Roanoke River Basin)
Facility Location

2 Sample collection must begin within the first 30 minutes of discharge and continue to all outfalls until
completed.
3 Sample Location: Samples shall be collected at each stormwater discharge outfall (SDO) unless
representative outfall status (ROS) has been granted by NC Division of Energy, Mineral, and Land
Resources (DEMI,R). A copy of the DEMLR letter granting ROS must be kept on site. DEMLR's ROS letter
remains in effect through the subsequent reissuance of this permit and as long as the pertinent site
conditions and operations remain unchanged, unless the ROS letter provides for other conditions or
duration.
4 For each sampled measureable storm event the total precipitation must be recorded front an oil -site rain
gauge. (Where isolated .cites are unmanned jor extended periods, a local rain gauge reading may he
substituted f r an on -site gauge, upon prior DEMLR written approval.)
5 N( benchmark applies for these parameters, however, levels above 0,34 mg/1 As, 0,056 mg/I Se, or
outside a pH range of 6.0-9.0 S.0 should be noted on the Stormwater Data Monitoring Report I SDMR)
..... , submitted to NC DENR.
is
This Certificate of Coverage shall became effective December 20, 2013.
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day, December 20, 2013.
for Tracy E. Davis, P.E., Director
Division of Energy, Mineral, and Land Resources
By the Authority of the Environmental Management Commission
ICOC No. NCG120101
effective December 30, 2013